21372085

素因数分解:

$5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{1051}}^1$

素因数の和:1153

約数の個数: 24

約数和(自身を含む): 30221856

約数和(自身を除く): 8849771

約数列:

[1, 5, 7, 35, 49, 83, 245, 415, 581, 1051, 2905, 4067, 5255, 7357, 20335, 36785, 51499, 87233, 257495, 436165, 610631, 3053155, 4274417, 21372085]

約数ペア:

[(1, 21372085), (5, 4274417), (7, 3053155), (35, 610631), (49, 436165), (83, 257495), (245, 87233), (415, 51499), (581, 36785), (1051, 20335), (2905, 7357), (4067, 5255)]