28821380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1621}}^1$

素因数の和:1764

約数の個数: 48

約数和(自身を含む): 69758976

約数和(自身を除く): 40937596

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1270, 1621, 1778, 2540, 3242, 3556, 4445, 6484, 8105, 8890, 11347, 16210, 17780, 22694, 32420, 45388, 56735, 113470, 205867, 226940, 411734, 823468, 1029335, 1441069, 2058670, 2882138, 4117340, 5764276, 7205345, 14410690, 28821380]

約数ペア:

[(1, 28821380), (2, 14410690), (4, 7205345), (5, 5764276), (7, 4117340), (10, 2882138), (14, 2058670), (20, 1441069), (28, 1029335), (35, 823468), (70, 411734), (127, 226940), (140, 205867), (254, 113470), (508, 56735), (635, 45388), (889, 32420), (1270, 22694), (1621, 17780), (1778, 16210), (2540, 11347), (3242, 8890), (3556, 8105), (4445, 6484)]