21123415

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{1009}}^1$

素因数の和:1146

約数の個数: 16

約数和(自身を含む): 26179200

約数和(自身を除く): 5055785

約数列:

[1, 5, 53, 79, 265, 395, 1009, 4187, 5045, 20935, 53477, 79711, 267385, 398555, 4224683, 21123415]

約数ペア:

[(1, 21123415), (5, 4224683), (53, 398555), (79, 267385), (265, 79711), (395, 53477), (1009, 20935), (4187, 5045)]