21000869125

素因数分解:

$5^3\times {\mathrm{1609}}^1\times {\mathrm{104417}}^1$

素因数の和:106041

約数の個数: 16

約数和(自身を含む): 26225624880

約数和(自身を除く): 5224755755

約数列:

[1, 5, 25, 125, 1609, 8045, 40225, 104417, 201125, 522085, 2610425, 13052125, 168006953, 840034765, 4200173825, 21000869125]

約数ペア:

[(1, 21000869125), (5, 4200173825), (25, 840034765), (125, 168006953), (1609, 13052125), (8045, 2610425), (40225, 522085), (104417, 201125)]