21009275

素因数分解:

$5^2\times 7^1\times {\mathrm{271}}^1\times {\mathrm{443}}^1$

素因数の和:731

約数の個数: 24

約数和(自身を含む): 29950464

約数和(自身を除く): 8941189

約数列:

[1, 5, 7, 25, 35, 175, 271, 443, 1355, 1897, 2215, 3101, 6775, 9485, 11075, 15505, 47425, 77525, 120053, 600265, 840371, 3001325, 4201855, 21009275]

約数ペア:

[(1, 21009275), (5, 4201855), (7, 3001325), (25, 840371), (35, 600265), (175, 120053), (271, 77525), (443, 47425), (1355, 15505), (1897, 11075), (2215, 9485), (3101, 6775)]