20781972

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1321}}^1$

素因数の和:1373

約数の個数: 72

約数和(自身を含む): 57744960

約数和(自身を除く): 36962988

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 23, 36, 38, 46, 57, 69, 76, 92, 114, 138, 171, 207, 228, 276, 342, 414, 437, 684, 828, 874, 1311, 1321, 1748, 2622, 2642, 3933, 3963, 5244, 5284, 7866, 7926, 11889, 15732, 15852, 23778, 25099, 30383, 47556, 50198, 60766, 75297, 91149, 100396, 121532, 150594, 182298, 225891, 273447, 301188, 364596, 451782, 546894, 577277, 903564, 1093788, 1154554, 1731831, 2309108, 3463662, 5195493, 6927324, 10390986, 20781972]

約数ペア:

[(1, 20781972), (2, 10390986), (3, 6927324), (4, 5195493), (6, 3463662), (9, 2309108), (12, 1731831), (18, 1154554), (19, 1093788), (23, 903564), (36, 577277), (38, 546894), (46, 451782), (57, 364596), (69, 301188), (76, 273447), (92, 225891), (114, 182298), (138, 150594), (171, 121532), (207, 100396), (228, 91149), (276, 75297), (342, 60766), (414, 50198), (437, 47556), (684, 30383), (828, 25099), (874, 23778), (1311, 15852), (1321, 15732), (1748, 11889), (2622, 7926), (2642, 7866), (3933, 5284), (3963, 5244)]