18686768

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{173}}^1$

素因数の和:381

約数の個数: 40

約数和(自身を含む): 37499088

約数和(自身を除く): 18812320

約数列:

[1, 2, 4, 8, 16, 43, 86, 157, 172, 173, 314, 344, 346, 628, 688, 692, 1256, 1384, 2512, 2768, 6751, 7439, 13502, 14878, 27004, 27161, 29756, 54008, 54322, 59512, 108016, 108644, 119024, 217288, 434576, 1167923, 2335846, 4671692, 9343384, 18686768]

約数ペア:

[(1, 18686768), (2, 9343384), (4, 4671692), (8, 2335846), (16, 1167923), (43, 434576), (86, 217288), (157, 119024), (172, 108644), (173, 108016), (314, 59512), (344, 54322), (346, 54008), (628, 29756), (688, 27161), (692, 27004), (1256, 14878), (1384, 13502), (2512, 7439), (2768, 6751)]