21123140

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10457}}^1$

素因数の和:10567

約数の個数: 24

約数和(自身を含む): 44802072

約数和(自身を除く): 23678932

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10457, 20914, 41828, 52285, 104570, 209140, 1056157, 2112314, 4224628, 5280785, 10561570, 21123140]

約数ペア:

[(1, 21123140), (2, 10561570), (4, 5280785), (5, 4224628), (10, 2112314), (20, 1056157), (101, 209140), (202, 104570), (404, 52285), (505, 41828), (1010, 20914), (2020, 10457)]