20778138

素因数分解:

$2^1\times 3^2\times {\mathrm{491}}^1\times {\mathrm{2351}}^1$

素因数の和:2850

約数の個数: 24

約数和(自身を含む): 45130176

約数和(自身を除く): 24352038

約数列:

[1, 2, 3, 6, 9, 18, 491, 982, 1473, 2351, 2946, 4419, 4702, 7053, 8838, 14106, 21159, 42318, 1154341, 2308682, 3463023, 6926046, 10389069, 20778138]

約数ペア:

[(1, 20778138), (2, 10389069), (3, 6926046), (6, 3463023), (9, 2308682), (18, 1154341), (491, 42318), (982, 21159), (1473, 14106), (2351, 8838), (2946, 7053), (4419, 4702)]