19802840

素因数分解:

$2^3\times 5^1\times {\mathrm{495071}}^1$

素因数の和:495082

約数の個数: 16

約数和(自身を含む): 44556480

約数和(自身を除く): 24753640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495071, 990142, 1980284, 2475355, 3960568, 4950710, 9901420, 19802840]

約数ペア:

[(1, 19802840), (2, 9901420), (4, 4950710), (5, 3960568), (8, 2475355), (10, 1980284), (20, 990142), (40, 495071)]