21231651

素因数分解:

$3^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{1489}}^1$

素因数の和:1603

約数の個数: 24

約数和(自身を含む): 33292560

約数和(自身を除く): 12060909

約数列:

[1, 3, 7, 21, 49, 97, 147, 291, 679, 1489, 2037, 4467, 4753, 10423, 14259, 31269, 72961, 144433, 218883, 433299, 1011031, 3033093, 7077217, 21231651]

約数ペア:

[(1, 21231651), (3, 7077217), (7, 3033093), (21, 1011031), (49, 433299), (97, 218883), (147, 144433), (291, 72961), (679, 31269), (1489, 14259), (2037, 10423), (4467, 4753)]