77640820

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{9221}}^1$

素因数の和:9651

約数の個数: 24

約数和(自身を含む): 163450728

約数和(自身を除く): 85809908

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210, 8420, 9221, 18442, 36884, 46105, 92210, 184420, 3882041, 7764082, 15528164, 19410205, 38820410, 77640820]

約数ペア:

[(1, 77640820), (2, 38820410), (4, 19410205), (5, 15528164), (10, 7764082), (20, 3882041), (421, 184420), (842, 92210), (1684, 46105), (2105, 36884), (4210, 18442), (8420, 9221)]