20515040

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1409}}^1$

素因数の和:1444

約数の個数: 96

約数和(自身を含む): 59693760

約数和(自身を除く): 39178720

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 160, 182, 208, 224, 260, 280, 364, 416, 455, 520, 560, 728, 910, 1040, 1120, 1409, 1456, 1820, 2080, 2818, 2912, 3640, 5636, 7045, 7280, 9863, 11272, 14090, 14560, 18317, 19726, 22544, 28180, 36634, 39452, 45088, 49315, 56360, 73268, 78904, 91585, 98630, 112720, 128219, 146536, 157808, 183170, 197260, 225440, 256438, 293072, 315616, 366340, 394520, 512876, 586144, 641095, 732680, 789040, 1025752, 1282190, 1465360, 1578080, 2051504, 2564380, 2930720, 4103008, 5128760, 10257520, 20515040]

約数ペア:

[(1, 20515040), (2, 10257520), (4, 5128760), (5, 4103008), (7, 2930720), (8, 2564380), (10, 2051504), (13, 1578080), (14, 1465360), (16, 1282190), (20, 1025752), (26, 789040), (28, 732680), (32, 641095), (35, 586144), (40, 512876), (52, 394520), (56, 366340), (65, 315616), (70, 293072), (80, 256438), (91, 225440), (104, 197260), (112, 183170), (130, 157808), (140, 146536), (160, 128219), (182, 112720), (208, 98630), (224, 91585), (260, 78904), (280, 73268), (364, 56360), (416, 49315), (455, 45088), (520, 39452), (560, 36634), (728, 28180), (910, 22544), (1040, 19726), (1120, 18317), (1409, 14560), (1456, 14090), (1820, 11272), (2080, 9863), (2818, 7280), (2912, 7045), (3640, 5636)]