81156875

素因数分解:

$5^4\times {\mathrm{89}}^1\times {\mathrm{1459}}^1$

素因数の和:1568

約数の個数: 20

約数和(自身を含む): 102623400

約数和(自身を除く): 21466525

約数列:

[1, 5, 25, 89, 125, 445, 625, 1459, 2225, 7295, 11125, 36475, 55625, 129851, 182375, 649255, 911875, 3246275, 16231375, 81156875]

約数ペア:

[(1, 81156875), (5, 16231375), (25, 3246275), (89, 911875), (125, 649255), (445, 182375), (625, 129851), (1459, 55625), (2225, 36475), (7295, 11125)]