18281277

素因数分解:

$3^2\times 7^1\times {\mathrm{439}}^1\times {\mathrm{661}}^1$

素因数の和:1113

約数の個数: 24

約数和(自身を含む): 30293120

約数和(自身を除く): 12011843

約数列:

[1, 3, 7, 9, 21, 63, 439, 661, 1317, 1983, 3073, 3951, 4627, 5949, 9219, 13881, 27657, 41643, 290179, 870537, 2031253, 2611611, 6093759, 18281277]

約数ペア:

[(1, 18281277), (3, 6093759), (7, 2611611), (9, 2031253), (21, 870537), (63, 290179), (439, 41643), (661, 27657), (1317, 13881), (1983, 9219), (3073, 5949), (3951, 4627)]