28520660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1487}}^1$

素因数の和:1640

約数の個数: 48

約数和(自身を含む): 68995584

約数和(自身を除く): 40474924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1370, 1487, 1918, 2740, 2974, 3836, 4795, 5948, 7435, 9590, 10409, 14870, 19180, 20818, 29740, 41636, 52045, 104090, 203719, 208180, 407438, 814876, 1018595, 1426033, 2037190, 2852066, 4074380, 5704132, 7130165, 14260330, 28520660]

約数ペア:

[(1, 28520660), (2, 14260330), (4, 7130165), (5, 5704132), (7, 4074380), (10, 2852066), (14, 2037190), (20, 1426033), (28, 1018595), (35, 814876), (70, 407438), (137, 208180), (140, 203719), (274, 104090), (548, 52045), (685, 41636), (959, 29740), (1370, 20818), (1487, 19180), (1918, 14870), (2740, 10409), (2974, 9590), (3836, 7435), (4795, 5948)]