20316680

素因数分解:

$2^3\times 5^1\times {\mathrm{507917}}^1$

素因数の和:507928

約数の個数: 16

約数和(自身を含む): 45712620

約数和(自身を除く): 25395940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 507917, 1015834, 2031668, 2539585, 4063336, 5079170, 10158340, 20316680]

約数ペア:

[(1, 20316680), (2, 10158340), (4, 5079170), (5, 4063336), (8, 2539585), (10, 2031668), (20, 1015834), (40, 507917)]