21488140

素因数分解:

$2^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{2351}}^1$

素因数の和:2817

約数の個数: 24

約数和(自身を含む): 45243072

約数和(自身を除く): 23754932

約数列:

[1, 2, 4, 5, 10, 20, 457, 914, 1828, 2285, 2351, 4570, 4702, 9140, 9404, 11755, 23510, 47020, 1074407, 2148814, 4297628, 5372035, 10744070, 21488140]

約数ペア:

[(1, 21488140), (2, 10744070), (4, 5372035), (5, 4297628), (10, 2148814), (20, 1074407), (457, 47020), (914, 23510), (1828, 11755), (2285, 9404), (2351, 9140), (4570, 4702)]