20011257

素因数分解:

$3^2\times 7^2\times {\mathrm{45377}}^1$

素因数の和:45397

約数の個数: 18

約数和(自身を含む): 33625098

約数和(自身を除く): 13613841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45377, 136131, 317639, 408393, 952917, 2223473, 2858751, 6670419, 20011257]

約数ペア:

[(1, 20011257), (3, 6670419), (7, 2858751), (9, 2223473), (21, 952917), (49, 408393), (63, 317639), (147, 136131), (441, 45377)]