21805525

素因数分解:

$5^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2351}}^1$

素因数の和:2421

約数の個数: 24

約数和(自身を含む): 31497984

約数和(自身を除く): 9692459

約数列:

[1, 5, 7, 25, 35, 53, 175, 265, 371, 1325, 1855, 2351, 9275, 11755, 16457, 58775, 82285, 124603, 411425, 623015, 872221, 3115075, 4361105, 21805525]

約数ペア:

[(1, 21805525), (5, 4361105), (7, 3115075), (25, 872221), (35, 623015), (53, 411425), (175, 124603), (265, 82285), (371, 58775), (1325, 16457), (1855, 11755), (2351, 9275)]