21342489

素因数分解:

$3^1\times 7^4\times {\mathrm{2963}}^1$

素因数の和:2994

約数の個数: 20

約数和(自身を含む): 33208656

約数和(自身を除く): 11866167

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 2963, 7203, 8889, 20741, 62223, 145187, 435561, 1016309, 3048927, 7114163, 21342489]

約数ペア:

[(1, 21342489), (3, 7114163), (7, 3048927), (21, 1016309), (49, 435561), (147, 145187), (343, 62223), (1029, 20741), (2401, 8889), (2963, 7203)]