21000739185

素因数分解:

$3^5\times 5^1\times {\mathrm{3331}}^1\times {\mathrm{5189}}^1$

素因数の和:8540

約数の個数: 48

約数和(自身を含む): 37768086720

約数和(自身を除く): 16767347535

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 3331, 5189, 9993, 15567, 16655, 25945, 29979, 46701, 49965, 77835, 89937, 140103, 149895, 233505, 269811, 420309, 449685, 700515, 809433, 1260927, 1349055, 2101545, 4047165, 6304635, 17284559, 51853677, 86422795, 155561031, 259268385, 466683093, 777805155, 1400049279, 2333415465, 4200147837, 7000246395, 21000739185]

約数ペア:

[(1, 21000739185), (3, 7000246395), (5, 4200147837), (9, 2333415465), (15, 1400049279), (27, 777805155), (45, 466683093), (81, 259268385), (135, 155561031), (243, 86422795), (405, 51853677), (1215, 17284559), (3331, 6304635), (5189, 4047165), (9993, 2101545), (15567, 1349055), (16655, 1260927), (25945, 809433), (29979, 700515), (46701, 449685), (49965, 420309), (77835, 269811), (89937, 233505), (140103, 149895)]