19924375

素因数分解:

$5^4\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:540

約数の個数: 20

約数和(自身を含む): 25304400

約数和(自身を除く): 5380025

約数列:

[1, 5, 25, 71, 125, 355, 449, 625, 1775, 2245, 8875, 11225, 31879, 44375, 56125, 159395, 280625, 796975, 3984875, 19924375]

約数ペア:

[(1, 19924375), (5, 3984875), (25, 796975), (71, 280625), (125, 159395), (355, 56125), (449, 44375), (625, 31879), (1775, 11225), (2245, 8875)]