21898755

素因数分解:

$3^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:545

約数の個数: 40

約数和(自身を含む): 39639600

約数和(自身を除く): 17740845

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 139, 389, 405, 417, 695, 1167, 1251, 1945, 2085, 3501, 3753, 5835, 6255, 10503, 11259, 17505, 18765, 31509, 52515, 54071, 56295, 157545, 162213, 270355, 486639, 811065, 1459917, 2433195, 4379751, 7299585, 21898755]

約数ペア:

[(1, 21898755), (3, 7299585), (5, 4379751), (9, 2433195), (15, 1459917), (27, 811065), (45, 486639), (81, 270355), (135, 162213), (139, 157545), (389, 56295), (405, 54071), (417, 52515), (695, 31509), (1167, 18765), (1251, 17505), (1945, 11259), (2085, 10503), (3501, 6255), (3753, 5835)]