12780639

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:252

約数の個数: 32

約数和(自身を含む): 19699200

約数和(自身を除く): 6918561

約数列:

[1, 3, 9, 27, 59, 71, 113, 177, 213, 339, 531, 639, 1017, 1593, 1917, 3051, 4189, 6667, 8023, 12567, 20001, 24069, 37701, 60003, 72207, 113103, 180009, 216621, 473357, 1420071, 4260213, 12780639]

約数ペア:

[(1, 12780639), (3, 4260213), (9, 1420071), (27, 473357), (59, 216621), (71, 180009), (113, 113103), (177, 72207), (213, 60003), (339, 37701), (531, 24069), (639, 20001), (1017, 12567), (1593, 8023), (1917, 6667), (3051, 4189)]