20881690

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{56437}}^1$

素因数の和:56481

約数の個数: 16

約数和(自身を含む): 38603592

約数和(自身を除く): 17721902

約数列:

[1, 2, 5, 10, 37, 74, 185, 370, 56437, 112874, 282185, 564370, 2088169, 4176338, 10440845, 20881690]

約数ペア:

[(1, 20881690), (2, 10440845), (5, 4176338), (10, 2088169), (37, 564370), (74, 282185), (185, 112874), (370, 56437)]