81201875

素因数分解:

$5^4\times {\mathrm{173}}^1\times {\mathrm{751}}^1$

素因数の和:944

約数の個数: 20

約数和(自身を含む): 102192288

約数和(自身を除く): 20990413

約数列:

[1, 5, 25, 125, 173, 625, 751, 865, 3755, 4325, 18775, 21625, 93875, 108125, 129923, 469375, 649615, 3248075, 16240375, 81201875]

約数ペア:

[(1, 81201875), (5, 16240375), (25, 3248075), (125, 649615), (173, 469375), (625, 129923), (751, 108125), (865, 93875), (3755, 21625), (4325, 18775)]