21291555

素因数分解:

$3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{9041}}^1$

素因数の和:9206

約数の個数: 16

約数和(自身を含む): 34287264

約数和(自身を除く): 12995709

約数列:

[1, 3, 5, 15, 157, 471, 785, 2355, 9041, 27123, 45205, 135615, 1419437, 4258311, 7097185, 21291555]

約数ペア:

[(1, 21291555), (3, 7097185), (5, 4258311), (15, 1419437), (157, 135615), (471, 45205), (785, 27123), (2355, 9041)]