129807725

素因数分解:

$5^2\times {\mathrm{101}}^2\times {\mathrm{509}}^1$

素因数の和:721

約数の個数: 18

約数和(自身を含む): 162890430

約数和(自身を除く): 33082705

約数列:

[1, 5, 25, 101, 505, 509, 2525, 2545, 10201, 12725, 51005, 51409, 255025, 257045, 1285225, 5192309, 25961545, 129807725]

約数ペア:

[(1, 129807725), (5, 25961545), (25, 5192309), (101, 1285225), (505, 257045), (509, 255025), (2525, 51409), (2545, 51005), (10201, 12725)]