21285128

素因数分解:

$2^3\times {\mathrm{79}}^1\times {\mathrm{33679}}^1$

素因数の和:33764

約数の個数: 16

約数和(自身を含む): 40416000

約数和(自身を除く): 19130872

約数列:

[1, 2, 4, 8, 79, 158, 316, 632, 33679, 67358, 134716, 269432, 2660641, 5321282, 10642564, 21285128]

約数ペア:

[(1, 21285128), (2, 10642564), (4, 5321282), (8, 2660641), (79, 269432), (158, 134716), (316, 67358), (632, 33679)]