21930489

素因数分解:

$3^2\times 7^2\times {\mathrm{223}}^2$

素因数の和:466

約数の個数: 27

約数和(自身を含む): 37015173

約数和(自身を除く): 15084684

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 223, 441, 669, 1561, 2007, 4683, 10927, 14049, 32781, 49729, 98343, 149187, 348103, 447561, 1044309, 2436721, 3132927, 7310163, 21930489]

約数ペア:

[(1, 21930489), (3, 7310163), (7, 3132927), (9, 2436721), (21, 1044309), (49, 447561), (63, 348103), (147, 149187), (223, 98343), (441, 49729), (669, 32781), (1561, 14049), (2007, 10927)]