400800220

素因数分解:

$2^2\times 5^1\times {\mathrm{4099}}^1\times {\mathrm{4889}}^1$

素因数の和:8997

約数の個数: 24

約数和(自身を含む): 842058000

約数和(自身を除く): 441257780

約数列:

[1, 2, 4, 5, 10, 20, 4099, 4889, 8198, 9778, 16396, 19556, 20495, 24445, 40990, 48890, 81980, 97780, 20040011, 40080022, 80160044, 100200055, 200400110, 400800220]

約数ペア:

[(1, 400800220), (2, 200400110), (4, 100200055), (5, 80160044), (10, 40080022), (20, 20040011), (4099, 97780), (4889, 81980), (8198, 48890), (9778, 40990), (16396, 24445), (19556, 20495)]