21105215

素因数分解:

$5^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1\times {\mathrm{383}}^1$

素因数の和:598

約数の個数: 16

約数和(自身を含む): 25878528

約数和(自身を除く): 4773313

約数列:

[1, 5, 103, 107, 383, 515, 535, 1915, 11021, 39449, 40981, 55105, 197245, 204905, 4221043, 21105215]

約数ペア:

[(1, 21105215), (5, 4221043), (103, 204905), (107, 197245), (383, 55105), (515, 40981), (535, 39449), (1915, 11021)]