640810240

素因数分解:

$2^8\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{601}}^1$

素因数の和:653

約数の個数: 216

約数和(自身を含む): 1893721032

約数和(自身を除く): 1252910792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 17, 20, 28, 32, 34, 35, 40, 49, 56, 64, 68, 70, 80, 85, 98, 112, 119, 128, 136, 140, 160, 170, 196, 224, 238, 245, 256, 272, 280, 320, 340, 392, 448, 476, 490, 544, 560, 595, 601, 640, 680, 784, 833, 896, 952, 980, 1088, 1120, 1190, 1202, 1280, 1360, 1568, 1666, 1792, 1904, 1960, 2176, 2240, 2380, 2404, 2720, 3005, 3136, 3332, 3808, 3920, 4165, 4207, 4352, 4480, 4760, 4808, 5440, 6010, 6272, 6664, 7616, 7840, 8330, 8414, 8960, 9520, 9616, 10217, 10880, 12020, 12544, 13328, 15232, 15680, 16660, 16828, 19040, 19232, 20434, 21035, 21760, 24040, 26656, 29449, 30464, 31360, 33320, 33656, 38080, 38464, 40868, 42070, 48080, 51085, 53312, 58898, 62720, 66640, 67312, 71519, 76160, 76928, 81736, 84140, 96160, 102170, 106624, 117796, 133280, 134624, 143038, 147245, 152320, 153856, 163472, 168280, 192320, 204340, 213248, 235592, 266560, 269248, 286076, 294490, 326944, 336560, 357595, 384640, 408680, 471184, 500633, 533120, 538496, 572152, 588980, 653888, 673120, 715190, 769280, 817360, 942368, 1001266, 1066240, 1076992, 1144304, 1177960, 1307776, 1346240, 1430380, 1634720, 1884736, 2002532, 2288608, 2355920, 2503165, 2615552, 2692480, 2860760, 3269440, 3769472, 4005064, 4577216, 4711840, 5006330, 5384960, 5721520, 6538880, 7538944, 8010128, 9154432, 9423680, 10012660, 11443040, 13077760, 16020256, 18308864, 18847360, 20025320, 22886080, 32040512, 37694720, 40050640, 45772160, 64081024, 80101280, 91544320, 128162048, 160202560, 320405120, 640810240]

約数ペア:

[(1, 640810240), (2, 320405120), (4, 160202560), (5, 128162048), (7, 91544320), (8, 80101280), (10, 64081024), (14, 45772160), (16, 40050640), (17, 37694720), (20, 32040512), (28, 22886080), (32, 20025320), (34, 18847360), (35, 18308864), (40, 16020256), (49, 13077760), (56, 11443040), (64, 10012660), (68, 9423680), (70, 9154432), (80, 8010128), (85, 7538944), (98, 6538880), (112, 5721520), (119, 5384960), (128, 5006330), (136, 4711840), (140, 4577216), (160, 4005064), (170, 3769472), (196, 3269440), (224, 2860760), (238, 2692480), (245, 2615552), (256, 2503165), (272, 2355920), (280, 2288608), (320, 2002532), (340, 1884736), (392, 1634720), (448, 1430380), (476, 1346240), (490, 1307776), (544, 1177960), (560, 1144304), (595, 1076992), (601, 1066240), (640, 1001266), (680, 942368), (784, 817360), (833, 769280), (896, 715190), (952, 673120), (980, 653888), (1088, 588980), (1120, 572152), (1190, 538496), (1202, 533120), (1280, 500633), (1360, 471184), (1568, 408680), (1666, 384640), (1792, 357595), (1904, 336560), (1960, 326944), (2176, 294490), (2240, 286076), (2380, 269248), (2404, 266560), (2720, 235592), (3005, 213248), (3136, 204340), (3332, 192320), (3808, 168280), (3920, 163472), (4165, 153856), (4207, 152320), (4352, 147245), (4480, 143038), (4760, 134624), (4808, 133280), (5440, 117796), (6010, 106624), (6272, 102170), (6664, 96160), (7616, 84140), (7840, 81736), (8330, 76928), (8414, 76160), (8960, 71519), (9520, 67312), (9616, 66640), (10217, 62720), (10880, 58898), (12020, 53312), (12544, 51085), (13328, 48080), (15232, 42070), (15680, 40868), (16660, 38464), (16828, 38080), (19040, 33656), (19232, 33320), (20434, 31360), (21035, 30464), (21760, 29449), (24040, 26656)]