21942160

素因数分解:

$2^4\times 5^1\times {\mathrm{274277}}^1$

素因数の和:274290

約数の個数: 20

約数和(自身を含む): 51015708

約数和(自身を除く): 29073548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274277, 548554, 1097108, 1371385, 2194216, 2742770, 4388432, 5485540, 10971080, 21942160]

約数ペア:

[(1, 21942160), (2, 10971080), (4, 5485540), (5, 4388432), (8, 2742770), (10, 2194216), (16, 1371385), (20, 1097108), (40, 548554), (80, 274277)]