20509128

素因数分解:

$2^3\times 3^2\times {\mathrm{443}}^1\times {\mathrm{643}}^1$

素因数の和:1098

約数の個数: 48

約数和(自身を含む): 55757520

約数和(自身を除く): 35248392

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 443, 643, 886, 1286, 1329, 1772, 1929, 2572, 2658, 3544, 3858, 3987, 5144, 5316, 5787, 7716, 7974, 10632, 11574, 15432, 15948, 23148, 31896, 46296, 284849, 569698, 854547, 1139396, 1709094, 2278792, 2563641, 3418188, 5127282, 6836376, 10254564, 20509128]

約数ペア:

[(1, 20509128), (2, 10254564), (3, 6836376), (4, 5127282), (6, 3418188), (8, 2563641), (9, 2278792), (12, 1709094), (18, 1139396), (24, 854547), (36, 569698), (72, 284849), (443, 46296), (643, 31896), (886, 23148), (1286, 15948), (1329, 15432), (1772, 11574), (1929, 10632), (2572, 7974), (2658, 7716), (3544, 5787), (3858, 5316), (3987, 5144)]