31145380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:605

約数の個数: 72

約数和(自身を含む): 77479416

約数和(自身を除く): 46334036

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 61, 70, 98, 122, 140, 196, 244, 245, 305, 427, 490, 521, 610, 854, 980, 1042, 1220, 1708, 2084, 2135, 2605, 2989, 3647, 4270, 5210, 5978, 7294, 8540, 10420, 11956, 14588, 14945, 18235, 25529, 29890, 31781, 36470, 51058, 59780, 63562, 72940, 102116, 127124, 127645, 158905, 222467, 255290, 317810, 444934, 510580, 635620, 889868, 1112335, 1557269, 2224670, 3114538, 4449340, 6229076, 7786345, 15572690, 31145380]

約数ペア:

[(1, 31145380), (2, 15572690), (4, 7786345), (5, 6229076), (7, 4449340), (10, 3114538), (14, 2224670), (20, 1557269), (28, 1112335), (35, 889868), (49, 635620), (61, 510580), (70, 444934), (98, 317810), (122, 255290), (140, 222467), (196, 158905), (244, 127645), (245, 127124), (305, 102116), (427, 72940), (490, 63562), (521, 59780), (610, 51058), (854, 36470), (980, 31781), (1042, 29890), (1220, 25529), (1708, 18235), (2084, 14945), (2135, 14588), (2605, 11956), (2989, 10420), (3647, 8540), (4270, 7294), (5210, 5978)]