20812545

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 41469120

約数和(自身を除く): 20656575

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 59, 65, 67, 81, 117, 135, 177, 195, 201, 295, 335, 351, 405, 531, 585, 603, 767, 871, 885, 1005, 1053, 1593, 1755, 1809, 2301, 2613, 2655, 3015, 3835, 3953, 4355, 4779, 5265, 5427, 6903, 7839, 7965, 9045, 11505, 11859, 13065, 19765, 20709, 23517, 23895, 27135, 34515, 35577, 39195, 51389, 59295, 62127, 70551, 103545, 106731, 117585, 154167, 177885, 256945, 310635, 320193, 352755, 462501, 533655, 770835, 1387503, 1600965, 2312505, 4162509, 6937515, 20812545]

約数ペア:

[(1, 20812545), (3, 6937515), (5, 4162509), (9, 2312505), (13, 1600965), (15, 1387503), (27, 770835), (39, 533655), (45, 462501), (59, 352755), (65, 320193), (67, 310635), (81, 256945), (117, 177885), (135, 154167), (177, 117585), (195, 106731), (201, 103545), (295, 70551), (335, 62127), (351, 59295), (405, 51389), (531, 39195), (585, 35577), (603, 34515), (767, 27135), (871, 23895), (885, 23517), (1005, 20709), (1053, 19765), (1593, 13065), (1755, 11859), (1809, 11505), (2301, 9045), (2613, 7965), (2655, 7839), (3015, 6903), (3835, 5427), (3953, 5265), (4355, 4779)]