20811380

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5749}}^1$

素因数の和:5939

約数の個数: 24

約数和(自身を含む): 43953000

約数和(自身を除く): 23141620

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5749, 11498, 22996, 28745, 57490, 114980, 1040569, 2081138, 4162276, 5202845, 10405690, 20811380]

約数ペア:

[(1, 20811380), (2, 10405690), (4, 5202845), (5, 4162276), (10, 2081138), (20, 1040569), (181, 114980), (362, 57490), (724, 28745), (905, 22996), (1810, 11498), (3620, 5749)]