21182357

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{431}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 26593920

約数和(自身を除く): 5411563

約数列:

[1, 7, 17, 49, 59, 119, 413, 431, 833, 1003, 2891, 3017, 7021, 7327, 21119, 25429, 49147, 51289, 178003, 359023, 432293, 1246021, 3026051, 21182357]

約数ペア:

[(1, 21182357), (7, 3026051), (17, 1246021), (49, 432293), (59, 359023), (119, 178003), (413, 51289), (431, 49147), (833, 25429), (1003, 21119), (2891, 7327), (3017, 7021)]