19730975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{457}}^1$

素因数の和:635

約数の個数: 24

約数和(自身を含む): 26919408

約数和(自身を除く): 7188433

約数列:

[1, 5, 11, 25, 55, 157, 275, 457, 785, 1727, 2285, 3925, 5027, 8635, 11425, 25135, 43175, 71749, 125675, 358745, 789239, 1793725, 3946195, 19730975]

約数ペア:

[(1, 19730975), (5, 3946195), (11, 1793725), (25, 789239), (55, 358745), (157, 125675), (275, 71749), (457, 43175), (785, 25135), (1727, 11425), (2285, 8635), (3925, 5027)]