12840205

素因数分解:

$5^1\times 7^3\times {\mathrm{7487}}^1$

素因数の和:7513

約数の個数: 16

約数和(自身を含む): 17971200

約数和(自身を除く): 5130995

約数列:

[1, 5, 7, 35, 49, 245, 343, 1715, 7487, 37435, 52409, 262045, 366863, 1834315, 2568041, 12840205]

約数ペア:

[(1, 12840205), (5, 2568041), (7, 1834315), (35, 366863), (49, 262045), (245, 52409), (343, 37435), (1715, 7487)]