28657895

素因数分解:

$5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2207}}^1$

素因数の和:2279

約数の個数: 24

約数和(自身を含む): 40777344

約数和(自身を除く): 12119449

約数列:

[1, 5, 7, 35, 49, 53, 245, 265, 371, 1855, 2207, 2597, 11035, 12985, 15449, 77245, 108143, 116971, 540715, 584855, 818797, 4093985, 5731579, 28657895]

約数ペア:

[(1, 28657895), (5, 5731579), (7, 4093985), (35, 818797), (49, 584855), (53, 540715), (245, 116971), (265, 108143), (371, 77245), (1855, 15449), (2207, 12985), (2597, 11035)]