21038408

素因数分解:

$2^3\times {\mathrm{541}}^1\times {\mathrm{4861}}^1$

素因数の和:5408

約数の個数: 16

約数和(自身を含む): 39528060

約数和(自身を除く): 18489652

約数列:

[1, 2, 4, 8, 541, 1082, 2164, 4328, 4861, 9722, 19444, 38888, 2629801, 5259602, 10519204, 21038408]

約数ペア:

[(1, 21038408), (2, 10519204), (4, 5259602), (8, 2629801), (541, 38888), (1082, 19444), (2164, 9722), (4328, 4861)]