21993111

素因数分解:

$3^2\times 7^2\times {\mathrm{49871}}^1$

素因数の和:49891

約数の個数: 18

約数和(自身を含む): 36955152

約数和(自身を除く): 14962041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 49871, 149613, 349097, 448839, 1047291, 2443679, 3141873, 7331037, 21993111]

約数ペア:

[(1, 21993111), (3, 7331037), (7, 3141873), (9, 2443679), (21, 1047291), (49, 448839), (63, 349097), (147, 149613), (441, 49871)]