81509920

素因数分解:

$2^5\times 5^1\times {\mathrm{619}}^1\times {\mathrm{823}}^1$

素因数の和:1457

約数の個数: 48

約数和(自身を含む): 193112640

約数和(自身を除く): 111602720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 619, 823, 1238, 1646, 2476, 3095, 3292, 4115, 4952, 6190, 6584, 8230, 9904, 12380, 13168, 16460, 19808, 24760, 26336, 32920, 49520, 65840, 99040, 131680, 509437, 1018874, 2037748, 2547185, 4075496, 5094370, 8150992, 10188740, 16301984, 20377480, 40754960, 81509920]

約数ペア:

[(1, 81509920), (2, 40754960), (4, 20377480), (5, 16301984), (8, 10188740), (10, 8150992), (16, 5094370), (20, 4075496), (32, 2547185), (40, 2037748), (80, 1018874), (160, 509437), (619, 131680), (823, 99040), (1238, 65840), (1646, 49520), (2476, 32920), (3095, 26336), (3292, 24760), (4115, 19808), (4952, 16460), (6190, 13168), (6584, 12380), (8230, 9904)]