19979216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{73453}}^1$

素因数の和:73478

約数の個数: 20

約数和(自身を含む): 40987332

約数和(自身を除く): 21008116

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 73453, 146906, 293812, 587624, 1175248, 1248701, 2497402, 4994804, 9989608, 19979216]

約数ペア:

[(1, 19979216), (2, 9989608), (4, 4994804), (8, 2497402), (16, 1248701), (17, 1175248), (34, 587624), (68, 293812), (136, 146906), (272, 73453)]