20427561

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4211}}^1$

素因数の和:4242

約数の個数: 36

約数和(自身を含む): 37453104

約数和(自身を除く): 17025543

約数列:

[1, 3, 7, 9, 11, 21, 33, 49, 63, 77, 99, 147, 231, 441, 539, 693, 1617, 4211, 4851, 12633, 29477, 37899, 46321, 88431, 138963, 206339, 265293, 324247, 416889, 619017, 972741, 1857051, 2269729, 2918223, 6809187, 20427561]

約数ペア:

[(1, 20427561), (3, 6809187), (7, 2918223), (9, 2269729), (11, 1857051), (21, 972741), (33, 619017), (49, 416889), (63, 324247), (77, 265293), (99, 206339), (147, 138963), (231, 88431), (441, 46321), (539, 37899), (693, 29477), (1617, 12633), (4211, 4851)]