820381520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 240

約数和(自身を含む): 2358563328

約数和(自身を除く): 1538181808

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 43, 49, 56, 62, 70, 80, 86, 98, 112, 124, 140, 155, 157, 172, 196, 215, 217, 245, 248, 280, 301, 310, 314, 344, 392, 430, 434, 490, 496, 560, 602, 620, 628, 688, 784, 785, 860, 868, 980, 1085, 1099, 1204, 1240, 1256, 1333, 1505, 1519, 1570, 1720, 1736, 1960, 2107, 2170, 2198, 2408, 2480, 2512, 2666, 3010, 3038, 3140, 3440, 3472, 3920, 4214, 4340, 4396, 4816, 4867, 5332, 5495, 6020, 6076, 6280, 6665, 6751, 7595, 7693, 8428, 8680, 8792, 9331, 9734, 10535, 10664, 10990, 12040, 12152, 12560, 13330, 13502, 15190, 15386, 16856, 17360, 17584, 18662, 19468, 21070, 21328, 21980, 24080, 24304, 24335, 26660, 27004, 30380, 30772, 33712, 33755, 34069, 37324, 38465, 38936, 42140, 43960, 46655, 47257, 48670, 53320, 54008, 60760, 61544, 65317, 67510, 68138, 74648, 76930, 77872, 84280, 87920, 93310, 94514, 97340, 106640, 108016, 121520, 123088, 130634, 135020, 136276, 149296, 153860, 168560, 170345, 186620, 189028, 194680, 209281, 236285, 238483, 261268, 270040, 272552, 307720, 326585, 330799, 340690, 373240, 378056, 389360, 418562, 472570, 476966, 522536, 540080, 545104, 615440, 653170, 661598, 681380, 746480, 756112, 837124, 945140, 953932, 1045072, 1046405, 1192415, 1306340, 1323196, 1362760, 1464967, 1653995, 1674248, 1890280, 1907864, 2092810, 2384830, 2612680, 2646392, 2725520, 2929934, 3307990, 3348496, 3780560, 3815728, 4185620, 4769660, 5225360, 5292784, 5859868, 6615980, 7324835, 8371240, 9539320, 10254769, 11719736, 13231960, 14649670, 16742480, 19078640, 20509538, 23439472, 26463920, 29299340, 41019076, 51273845, 58598680, 82038152, 102547690, 117197360, 164076304, 205095380, 410190760, 820381520]

約数ペア:

[(1, 820381520), (2, 410190760), (4, 205095380), (5, 164076304), (7, 117197360), (8, 102547690), (10, 82038152), (14, 58598680), (16, 51273845), (20, 41019076), (28, 29299340), (31, 26463920), (35, 23439472), (40, 20509538), (43, 19078640), (49, 16742480), (56, 14649670), (62, 13231960), (70, 11719736), (80, 10254769), (86, 9539320), (98, 8371240), (112, 7324835), (124, 6615980), (140, 5859868), (155, 5292784), (157, 5225360), (172, 4769660), (196, 4185620), (215, 3815728), (217, 3780560), (245, 3348496), (248, 3307990), (280, 2929934), (301, 2725520), (310, 2646392), (314, 2612680), (344, 2384830), (392, 2092810), (430, 1907864), (434, 1890280), (490, 1674248), (496, 1653995), (560, 1464967), (602, 1362760), (620, 1323196), (628, 1306340), (688, 1192415), (784, 1046405), (785, 1045072), (860, 953932), (868, 945140), (980, 837124), (1085, 756112), (1099, 746480), (1204, 681380), (1240, 661598), (1256, 653170), (1333, 615440), (1505, 545104), (1519, 540080), (1570, 522536), (1720, 476966), (1736, 472570), (1960, 418562), (2107, 389360), (2170, 378056), (2198, 373240), (2408, 340690), (2480, 330799), (2512, 326585), (2666, 307720), (3010, 272552), (3038, 270040), (3140, 261268), (3440, 238483), (3472, 236285), (3920, 209281), (4214, 194680), (4340, 189028), (4396, 186620), (4816, 170345), (4867, 168560), (5332, 153860), (5495, 149296), (6020, 136276), (6076, 135020), (6280, 130634), (6665, 123088), (6751, 121520), (7595, 108016), (7693, 106640), (8428, 97340), (8680, 94514), (8792, 93310), (9331, 87920), (9734, 84280), (10535, 77872), (10664, 76930), (10990, 74648), (12040, 68138), (12152, 67510), (12560, 65317), (13330, 61544), (13502, 60760), (15190, 54008), (15386, 53320), (16856, 48670), (17360, 47257), (17584, 46655), (18662, 43960), (19468, 42140), (21070, 38936), (21328, 38465), (21980, 37324), (24080, 34069), (24304, 33755), (24335, 33712), (26660, 30772), (27004, 30380)]