12820720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{857}}^1$

素因数の和:898

約数の個数: 80

約数和(自身を含む): 34471008

約数和(自身を除く): 21650288

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 68, 80, 85, 88, 110, 136, 170, 176, 187, 220, 272, 340, 374, 440, 680, 748, 857, 880, 935, 1360, 1496, 1714, 1870, 2992, 3428, 3740, 4285, 6856, 7480, 8570, 9427, 13712, 14569, 14960, 17140, 18854, 29138, 34280, 37708, 47135, 58276, 68560, 72845, 75416, 94270, 116552, 145690, 150832, 160259, 188540, 233104, 291380, 320518, 377080, 582760, 641036, 754160, 801295, 1165520, 1282072, 1602590, 2564144, 3205180, 6410360, 12820720]

約数ペア:

[(1, 12820720), (2, 6410360), (4, 3205180), (5, 2564144), (8, 1602590), (10, 1282072), (11, 1165520), (16, 801295), (17, 754160), (20, 641036), (22, 582760), (34, 377080), (40, 320518), (44, 291380), (55, 233104), (68, 188540), (80, 160259), (85, 150832), (88, 145690), (110, 116552), (136, 94270), (170, 75416), (176, 72845), (187, 68560), (220, 58276), (272, 47135), (340, 37708), (374, 34280), (440, 29138), (680, 18854), (748, 17140), (857, 14960), (880, 14569), (935, 13712), (1360, 9427), (1496, 8570), (1714, 7480), (1870, 6856), (2992, 4285), (3428, 3740)]