21000275

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{311}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 27197664

約数和(自身を除く): 6197389

約数列:

[1, 5, 25, 37, 73, 185, 311, 365, 925, 1555, 1825, 2701, 7775, 11507, 13505, 22703, 57535, 67525, 113515, 287675, 567575, 840011, 4200055, 21000275]

約数ペア:

[(1, 21000275), (5, 4200055), (25, 840011), (37, 567575), (73, 287675), (185, 113515), (311, 67525), (365, 57535), (925, 22703), (1555, 13505), (1825, 11507), (2701, 7775)]