406575640

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{25603}}^1$

素因数の和:26011

約数の個数: 32

約数和(自身を含む): 917135280

約数和(自身を除く): 510559640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 15880, 25603, 51206, 102412, 128015, 204824, 256030, 512060, 1024120, 10164391, 20328782, 40657564, 50821955, 81315128, 101643910, 203287820, 406575640]

約数ペア:

[(1, 406575640), (2, 203287820), (4, 101643910), (5, 81315128), (8, 50821955), (10, 40657564), (20, 20328782), (40, 10164391), (397, 1024120), (794, 512060), (1588, 256030), (1985, 204824), (3176, 128015), (3970, 102412), (7940, 51206), (15880, 25603)]