20871484

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{257}}^2$

素因数の和:597

約数の個数: 18

約数和(自身を含む): 37131920

約数和(自身を除く): 16260436

約数列:

[1, 2, 4, 79, 158, 257, 316, 514, 1028, 20303, 40606, 66049, 81212, 132098, 264196, 5217871, 10435742, 20871484]

約数ペア:

[(1, 20871484), (2, 10435742), (4, 5217871), (79, 264196), (158, 132098), (257, 81212), (316, 66049), (514, 40606), (1028, 20303)]