21998560

素因数分解:

$2^5\times 5^1\times {\mathrm{137491}}^1$

素因数の和:137506

約数の個数: 24

約数和(自身を含む): 51971976

約数和(自身を除く): 29973416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 137491, 274982, 549964, 687455, 1099928, 1374910, 2199856, 2749820, 4399712, 5499640, 10999280, 21998560]

約数ペア:

[(1, 21998560), (2, 10999280), (4, 5499640), (5, 4399712), (8, 2749820), (10, 2199856), (16, 1374910), (20, 1099928), (32, 687455), (40, 549964), (80, 274982), (160, 137491)]