21647920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:123

約数の個数: 160

約数和(自身を含む): 62853120

約数和(自身を除く): 41205200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 31, 35, 40, 43, 56, 58, 62, 70, 80, 86, 112, 116, 124, 140, 145, 155, 172, 203, 215, 217, 232, 248, 280, 290, 301, 310, 344, 406, 430, 434, 464, 496, 560, 580, 602, 620, 688, 812, 860, 868, 899, 1015, 1085, 1160, 1204, 1240, 1247, 1333, 1505, 1624, 1720, 1736, 1798, 2030, 2170, 2320, 2408, 2480, 2494, 2666, 3010, 3248, 3440, 3472, 3596, 4060, 4340, 4495, 4816, 4988, 5332, 6020, 6235, 6293, 6665, 7192, 8120, 8680, 8729, 8990, 9331, 9976, 10664, 12040, 12470, 12586, 13330, 14384, 16240, 17360, 17458, 17980, 18662, 19952, 21328, 24080, 24940, 25172, 26660, 31465, 34916, 35960, 37324, 38657, 43645, 46655, 49880, 50344, 53320, 62930, 69832, 71920, 74648, 77314, 87290, 93310, 99760, 100688, 106640, 125860, 139664, 149296, 154628, 174580, 186620, 193285, 251720, 270599, 309256, 349160, 373240, 386570, 503440, 541198, 618512, 698320, 746480, 773140, 1082396, 1352995, 1546280, 2164792, 2705990, 3092560, 4329584, 5411980, 10823960, 21647920]

約数ペア:

[(1, 21647920), (2, 10823960), (4, 5411980), (5, 4329584), (7, 3092560), (8, 2705990), (10, 2164792), (14, 1546280), (16, 1352995), (20, 1082396), (28, 773140), (29, 746480), (31, 698320), (35, 618512), (40, 541198), (43, 503440), (56, 386570), (58, 373240), (62, 349160), (70, 309256), (80, 270599), (86, 251720), (112, 193285), (116, 186620), (124, 174580), (140, 154628), (145, 149296), (155, 139664), (172, 125860), (203, 106640), (215, 100688), (217, 99760), (232, 93310), (248, 87290), (280, 77314), (290, 74648), (301, 71920), (310, 69832), (344, 62930), (406, 53320), (430, 50344), (434, 49880), (464, 46655), (496, 43645), (560, 38657), (580, 37324), (602, 35960), (620, 34916), (688, 31465), (812, 26660), (860, 25172), (868, 24940), (899, 24080), (1015, 21328), (1085, 19952), (1160, 18662), (1204, 17980), (1240, 17458), (1247, 17360), (1333, 16240), (1505, 14384), (1624, 13330), (1720, 12586), (1736, 12470), (1798, 12040), (2030, 10664), (2170, 9976), (2320, 9331), (2408, 8990), (2480, 8729), (2494, 8680), (2666, 8120), (3010, 7192), (3248, 6665), (3440, 6293), (3472, 6235), (3596, 6020), (4060, 5332), (4340, 4988), (4495, 4816)]