81991375

素因数分解:

$5^3\times {\mathrm{797}}^1\times {\mathrm{823}}^1$

素因数の和:1635

約数の個数: 16

約数和(自身を含む): 102578112

約数和(自身を除く): 20586737

約数列:

[1, 5, 25, 125, 797, 823, 3985, 4115, 19925, 20575, 99625, 102875, 655931, 3279655, 16398275, 81991375]

約数ペア:

[(1, 81991375), (5, 16398275), (25, 3279655), (125, 655931), (797, 102875), (823, 99625), (3985, 20575), (4115, 19925)]