18923216

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{90977}}^1$

素因数の和:90998

約数の個数: 20

約数和(自身を含む): 39484452

約数和(自身を除く): 20561236

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 90977, 181954, 363908, 727816, 1182701, 1455632, 2365402, 4730804, 9461608, 18923216]

約数ペア:

[(1, 18923216), (2, 9461608), (4, 4730804), (8, 2365402), (13, 1455632), (16, 1182701), (26, 727816), (52, 363908), (104, 181954), (208, 90977)]