21555016

素因数分解:

$2^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 48372480

約数和(自身を除く): 26817464

約数列:

[1, 2, 4, 7, 8, 14, 28, 37, 56, 74, 101, 103, 148, 202, 206, 259, 296, 404, 412, 518, 707, 721, 808, 824, 1036, 1414, 1442, 2072, 2828, 2884, 3737, 3811, 5656, 5768, 7474, 7622, 10403, 14948, 15244, 20806, 26159, 26677, 29896, 30488, 41612, 52318, 53354, 72821, 83224, 104636, 106708, 145642, 209272, 213416, 291284, 384911, 582568, 769822, 1539644, 2694377, 3079288, 5388754, 10777508, 21555016]

約数ペア:

[(1, 21555016), (2, 10777508), (4, 5388754), (7, 3079288), (8, 2694377), (14, 1539644), (28, 769822), (37, 582568), (56, 384911), (74, 291284), (101, 213416), (103, 209272), (148, 145642), (202, 106708), (206, 104636), (259, 83224), (296, 72821), (404, 53354), (412, 52318), (518, 41612), (707, 30488), (721, 29896), (808, 26677), (824, 26159), (1036, 20806), (1414, 15244), (1442, 14948), (2072, 10403), (2828, 7622), (2884, 7474), (3737, 5768), (3811, 5656)]