21673981

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{1307}}^1$

素因数の和:1440

約数の個数: 16

約数和(自身を含む): 26118144

約数和(自身を除く): 4444163

約数列:

[1, 7, 23, 103, 161, 721, 1307, 2369, 9149, 16583, 30061, 134621, 210427, 942347, 3096283, 21673981]

約数ペア:

[(1, 21673981), (7, 3096283), (23, 942347), (103, 210427), (161, 134621), (721, 30061), (1307, 16583), (2369, 9149)]