21397976

素因数分解:

$2^3\times {\mathrm{127}}^1\times {\mathrm{21061}}^1$

素因数の和:21194

約数の個数: 16

約数和(自身を含む): 40439040

約数和(自身を除く): 19041064

約数列:

[1, 2, 4, 8, 127, 254, 508, 1016, 21061, 42122, 84244, 168488, 2674747, 5349494, 10698988, 21397976]

約数ペア:

[(1, 21397976), (2, 10698988), (4, 5349494), (8, 2674747), (127, 168488), (254, 84244), (508, 42122), (1016, 21061)]