18700820

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2221}}^1$

素因数の和:2651

約数の個数: 24

約数和(自身を含む): 39382728

約数和(自身を除く): 20681908

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2221, 4210, 4442, 8420, 8884, 11105, 22210, 44420, 935041, 1870082, 3740164, 4675205, 9350410, 18700820]

約数ペア:

[(1, 18700820), (2, 9350410), (4, 4675205), (5, 3740164), (10, 1870082), (20, 935041), (421, 44420), (842, 22210), (1684, 11105), (2105, 8884), (2221, 8420), (4210, 4442)]