20671100

素因数分解:

$2^2\times 5^2\times {\mathrm{421}}^1\times {\mathrm{491}}^1$

素因数の和:926

約数の個数: 36

約数和(自身を含む): 45054408

約数和(自身を除く): 24383308

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 421, 491, 842, 982, 1684, 1964, 2105, 2455, 4210, 4910, 8420, 9820, 10525, 12275, 21050, 24550, 42100, 49100, 206711, 413422, 826844, 1033555, 2067110, 4134220, 5167775, 10335550, 20671100]

約数ペア:

[(1, 20671100), (2, 10335550), (4, 5167775), (5, 4134220), (10, 2067110), (20, 1033555), (25, 826844), (50, 413422), (100, 206711), (421, 49100), (491, 42100), (842, 24550), (982, 21050), (1684, 12275), (1964, 10525), (2105, 9820), (2455, 8420), (4210, 4910)]