19975625

素因数分解:

$5^4\times {\mathrm{31}}^1\times {\mathrm{1031}}^1$

素因数の和:1082

約数の個数: 20

約数和(自身を含む): 25791744

約数和(自身を除く): 5816119

約数列:

[1, 5, 25, 31, 125, 155, 625, 775, 1031, 3875, 5155, 19375, 25775, 31961, 128875, 159805, 644375, 799025, 3995125, 19975625]

約数ペア:

[(1, 19975625), (5, 3995125), (25, 799025), (31, 644375), (125, 159805), (155, 128875), (625, 31961), (775, 25775), (1031, 19375), (3875, 5155)]