21395675

素因数分解:

$5^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1187}}^1$

素因数の和:1307

約数の個数: 24

約数和(自身を含む): 30640896

約数和(自身を除く): 9245221

約数列:

[1, 5, 7, 25, 35, 103, 175, 515, 721, 1187, 2575, 3605, 5935, 8309, 18025, 29675, 41545, 122261, 207725, 611305, 855827, 3056525, 4279135, 21395675]

約数ペア:

[(1, 21395675), (5, 4279135), (7, 3056525), (25, 855827), (35, 611305), (103, 207725), (175, 122261), (515, 41545), (721, 29675), (1187, 18025), (2575, 8309), (3605, 5935)]