21719840

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:226

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33437920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 31, 32, 40, 58, 62, 80, 116, 124, 145, 151, 155, 160, 232, 248, 290, 302, 310, 464, 496, 580, 604, 620, 755, 899, 928, 992, 1160, 1208, 1240, 1510, 1798, 2320, 2416, 2480, 3020, 3596, 4379, 4495, 4640, 4681, 4832, 4960, 6040, 7192, 8758, 8990, 9362, 12080, 14384, 17516, 17980, 18724, 21895, 23405, 24160, 28768, 35032, 35960, 37448, 43790, 46810, 70064, 71920, 74896, 87580, 93620, 135749, 140128, 143840, 149792, 175160, 187240, 271498, 350320, 374480, 542996, 678745, 700640, 748960, 1085992, 1357490, 2171984, 2714980, 4343968, 5429960, 10859920, 21719840]

約数ペア:

[(1, 21719840), (2, 10859920), (4, 5429960), (5, 4343968), (8, 2714980), (10, 2171984), (16, 1357490), (20, 1085992), (29, 748960), (31, 700640), (32, 678745), (40, 542996), (58, 374480), (62, 350320), (80, 271498), (116, 187240), (124, 175160), (145, 149792), (151, 143840), (155, 140128), (160, 135749), (232, 93620), (248, 87580), (290, 74896), (302, 71920), (310, 70064), (464, 46810), (496, 43790), (580, 37448), (604, 35960), (620, 35032), (755, 28768), (899, 24160), (928, 23405), (992, 21895), (1160, 18724), (1208, 17980), (1240, 17516), (1510, 14384), (1798, 12080), (2320, 9362), (2416, 8990), (2480, 8758), (3020, 7192), (3596, 6040), (4379, 4960), (4495, 4832), (4640, 4681)]