20917778

素因数分解:

$2^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{18913}}^1$

素因数の和:19001

約数の個数: 16

約数和(自身を含む): 36314880

約数和(自身を除く): 15397102

約数列:

[1, 2, 7, 14, 79, 158, 553, 1106, 18913, 37826, 132391, 264782, 1494127, 2988254, 10458889, 20917778]

約数ペア:

[(1, 20917778), (2, 10458889), (7, 2988254), (14, 1494127), (79, 264782), (158, 132391), (553, 37826), (1106, 18913)]