21015175

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{173}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 27056304

約数和(自身を除く): 6041129

約数列:

[1, 5, 25, 43, 113, 173, 215, 565, 865, 1075, 2825, 4325, 4859, 7439, 19549, 24295, 37195, 97745, 121475, 185975, 488725, 840607, 4203035, 21015175]

約数ペア:

[(1, 21015175), (5, 4203035), (25, 840607), (43, 488725), (113, 185975), (173, 121475), (215, 97745), (565, 37195), (865, 24295), (1075, 19549), (2825, 7439), (4325, 4859)]