21998427

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{229}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 11386533

約数列:

[1, 3, 11, 33, 41, 71, 123, 213, 229, 451, 687, 781, 1353, 2343, 2519, 2911, 7557, 8733, 9389, 16259, 28167, 32021, 48777, 96063, 103279, 178849, 309837, 536547, 666619, 1999857, 7332809, 21998427]

約数ペア:

[(1, 21998427), (3, 7332809), (11, 1999857), (33, 666619), (41, 536547), (71, 309837), (123, 178849), (213, 103279), (229, 96063), (451, 48777), (687, 32021), (781, 28167), (1353, 16259), (2343, 9389), (2519, 8733), (2911, 7557)]