19987713

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{433}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 30331392

約数和(自身を除く): 10343679

約数列:

[1, 3, 9, 23, 69, 207, 223, 433, 669, 1299, 2007, 3897, 5129, 9959, 15387, 29877, 46161, 89631, 96559, 289677, 869031, 2220857, 6662571, 19987713]

約数ペア:

[(1, 19987713), (3, 6662571), (9, 2220857), (23, 869031), (69, 289677), (207, 96559), (223, 89631), (433, 46161), (669, 29877), (1299, 15387), (2007, 9959), (3897, 5129)]