81561875

素因数分解:

$5^4\times {\mathrm{37}}^1\times {\mathrm{3527}}^1$

素因数の和:3584

約数の個数: 20

約数和(自身を含む): 104703984

約数和(自身を除く): 23142109

約数列:

[1, 5, 25, 37, 125, 185, 625, 925, 3527, 4625, 17635, 23125, 88175, 130499, 440875, 652495, 2204375, 3262475, 16312375, 81561875]

約数ペア:

[(1, 81561875), (5, 16312375), (25, 3262475), (37, 2204375), (125, 652495), (185, 440875), (625, 130499), (925, 88175), (3527, 23125), (4625, 17635)]