21439978

素因数分解:

$2^1\times 7^1\times {\mathrm{317}}^1\times {\mathrm{4831}}^1$

素因数の和:5157

約数の個数: 16

約数和(自身を含む): 36877824

約数和(自身を除く): 15437846

約数列:

[1, 2, 7, 14, 317, 634, 2219, 4438, 4831, 9662, 33817, 67634, 1531427, 3062854, 10719989, 21439978]

約数ペア:

[(1, 21439978), (2, 10719989), (7, 3062854), (14, 1531427), (317, 67634), (634, 33817), (2219, 9662), (4438, 4831)]