21008081128

素因数分解:

$2^3\times {\mathrm{129443}}^1\times {\mathrm{20287}}^1$

素因数の和:149736

約数の個数: 16

約数和(自身を含む): 39392398080

約数和(自身を除く): 18384316952

約数列:

[1, 2, 4, 8, 20287, 40574, 81148, 129443, 162296, 258886, 517772, 1035544, 2626010141, 5252020282, 10504040564, 21008081128]

約数ペア:

[(1, 21008081128), (2, 10504040564), (4, 5252020282), (8, 2626010141), (20287, 1035544), (40574, 517772), (81148, 258886), (129443, 162296)]