19801480

素因数分解:

$2^3\times 5^1\times {\mathrm{495037}}^1$

素因数の和:495048

約数の個数: 16

約数和(自身を含む): 44553420

約数和(自身を除く): 24751940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495037, 990074, 1980148, 2475185, 3960296, 4950370, 9900740, 19801480]

約数ペア:

[(1, 19801480), (2, 9900740), (4, 4950370), (5, 3960296), (8, 2475185), (10, 1980148), (20, 990074), (40, 495037)]