81546725

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{19301}}^1$

素因数の和:19337

約数の個数: 18

約数和(自身を含む): 109500246

約数和(自身を除く): 27953521

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 19301, 96505, 250913, 482525, 1254565, 3261869, 6272825, 16309345, 81546725]

約数ペア:

[(1, 81546725), (5, 16309345), (13, 6272825), (25, 3261869), (65, 1254565), (169, 482525), (325, 250913), (845, 96505), (4225, 19301)]