21670975

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:531

約数の個数: 24

約数和(自身を含む): 28257120

約数和(自身を除く): 6586145

約数列:

[1, 5, 25, 29, 71, 145, 355, 421, 725, 1775, 2059, 2105, 10295, 10525, 12209, 29891, 51475, 61045, 149455, 305225, 747275, 866839, 4334195, 21670975]

約数ペア:

[(1, 21670975), (5, 4334195), (25, 866839), (29, 747275), (71, 305225), (145, 149455), (355, 61045), (421, 51475), (725, 29891), (1775, 12209), (2059, 10525), (2105, 10295)]