20100625

素因数分解:

$5^4\times {\mathrm{29}}^1\times {\mathrm{1109}}^1$

素因数の和:1158

約数の個数: 20

約数和(自身を含む): 26007300

約数和(自身を除く): 5906675

約数列:

[1, 5, 25, 29, 125, 145, 625, 725, 1109, 3625, 5545, 18125, 27725, 32161, 138625, 160805, 693125, 804025, 4020125, 20100625]

約数ペア:

[(1, 20100625), (5, 4020125), (25, 804025), (29, 693125), (125, 160805), (145, 138625), (625, 32161), (725, 27725), (1109, 18125), (3625, 5545)]