20451555

素因数分解:

$3^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{769}}^1$

素因数の和:980

約数の個数: 32

約数和(自身を含む): 36590400

約数和(自身を除く): 16138845

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 197, 591, 769, 985, 1773, 2307, 2955, 3845, 5319, 6921, 8865, 11535, 20763, 26595, 34605, 103815, 151493, 454479, 757465, 1363437, 2272395, 4090311, 6817185, 20451555]

約数ペア:

[(1, 20451555), (3, 6817185), (5, 4090311), (9, 2272395), (15, 1363437), (27, 757465), (45, 454479), (135, 151493), (197, 103815), (591, 34605), (769, 26595), (985, 20763), (1773, 11535), (2307, 8865), (2955, 6921), (3845, 5319)]