156638620

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{19531}}^1$

素因数の和:19941

約数の個数: 24

約数和(自身を含む): 329778288

約数和(自身を除く): 173139668

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 19531, 39062, 78124, 97655, 195310, 390620, 7831931, 15663862, 31327724, 39159655, 78319310, 156638620]

約数ペア:

[(1, 156638620), (2, 78319310), (4, 39159655), (5, 31327724), (10, 15663862), (20, 7831931), (401, 390620), (802, 195310), (1604, 97655), (2005, 78124), (4010, 39062), (8020, 19531)]