21105357

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{797}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 35035392

約数和(自身を除く): 13930035

約数列:

[1, 3, 7, 13, 21, 39, 91, 97, 273, 291, 679, 797, 1261, 2037, 2391, 3783, 5579, 8827, 10361, 16737, 26481, 31083, 72527, 77309, 217581, 231927, 541163, 1005017, 1623489, 3015051, 7035119, 21105357]

約数ペア:

[(1, 21105357), (3, 7035119), (7, 3015051), (13, 1623489), (21, 1005017), (39, 541163), (91, 231927), (97, 217581), (273, 77309), (291, 72527), (679, 31083), (797, 26481), (1261, 16737), (2037, 10361), (2391, 8827), (3783, 5579)]