20774680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{223}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 29302760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 137, 170, 223, 274, 340, 446, 548, 680, 685, 892, 1096, 1115, 1370, 1784, 2230, 2329, 2740, 3791, 4460, 4658, 5480, 7582, 8920, 9316, 11645, 15164, 18632, 18955, 23290, 30328, 30551, 37910, 46580, 61102, 75820, 93160, 122204, 151640, 152755, 244408, 305510, 519367, 611020, 1038734, 1222040, 2077468, 2596835, 4154936, 5193670, 10387340, 20774680]

約数ペア:

[(1, 20774680), (2, 10387340), (4, 5193670), (5, 4154936), (8, 2596835), (10, 2077468), (17, 1222040), (20, 1038734), (34, 611020), (40, 519367), (68, 305510), (85, 244408), (136, 152755), (137, 151640), (170, 122204), (223, 93160), (274, 75820), (340, 61102), (446, 46580), (548, 37910), (680, 30551), (685, 30328), (892, 23290), (1096, 18955), (1115, 18632), (1370, 15164), (1784, 11645), (2230, 9316), (2329, 8920), (2740, 7582), (3791, 5480), (4460, 4658)]