20128042525

素因数分解:

$5^2\times {\mathrm{16249}}^1\times {\mathrm{49549}}^1$

素因数の和:65808

約数の個数: 12

約数和(自身を含む): 24960812500

約数和(自身を除く): 4832769975

約数列:

[1, 5, 25, 16249, 49549, 81245, 247745, 406225, 1238725, 805121701, 4025608505, 20128042525]

約数ペア:

[(1, 20128042525), (5, 4025608505), (25, 805121701), (16249, 1238725), (49549, 406225), (81245, 247745)]