21297575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3449}}^1$

素因数の和:3491

約数の個数: 24

約数和(自身を含む): 29946000

約数和(自身を除く): 8648425

約数列:

[1, 5, 13, 19, 25, 65, 95, 247, 325, 475, 1235, 3449, 6175, 17245, 44837, 65531, 86225, 224185, 327655, 851903, 1120925, 1638275, 4259515, 21297575]

約数ペア:

[(1, 21297575), (5, 4259515), (13, 1638275), (19, 1120925), (25, 851903), (65, 327655), (95, 224185), (247, 86225), (325, 65531), (475, 44837), (1235, 17245), (3449, 6175)]