21479885

素因数分解:

$5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1201}}^1$

素因数の和:1293

約数の個数: 24

約数和(自身を含む): 30420216

約数和(自身を除く): 8940331

約数列:

[1, 5, 7, 35, 49, 73, 245, 365, 511, 1201, 2555, 3577, 6005, 8407, 17885, 42035, 58849, 87673, 294245, 438365, 613711, 3068555, 4295977, 21479885]

約数ペア:

[(1, 21479885), (5, 4295977), (7, 3068555), (35, 613711), (49, 438365), (73, 294245), (245, 87673), (365, 58849), (511, 42035), (1201, 17885), (2555, 8407), (3577, 6005)]