20000525

素因数分解:

$5^2\times {\mathrm{89}}^2\times {\mathrm{101}}^1$

素因数の和:289

約数の個数: 18

約数和(自身を含む): 25330782

約数和(自身を除く): 5330257

約数列:

[1, 5, 25, 89, 101, 445, 505, 2225, 2525, 7921, 8989, 39605, 44945, 198025, 224725, 800021, 4000105, 20000525]

約数ペア:

[(1, 20000525), (5, 4000105), (25, 800021), (89, 224725), (101, 198025), (445, 44945), (505, 39605), (2225, 8989), (2525, 7921)]