18513621

素因数分解:

$3^2\times 7^2\times {\mathrm{41981}}^1$

素因数の和:42001

約数の個数: 18

約数和(自身を含む): 31108662

約数和(自身を除く): 12595041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 41981, 125943, 293867, 377829, 881601, 2057069, 2644803, 6171207, 18513621]

約数ペア:

[(1, 18513621), (3, 6171207), (7, 2644803), (9, 2057069), (21, 881601), (49, 377829), (63, 293867), (147, 125943), (441, 41981)]