20982280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1109}}^1$

素因数の和:1174

約数の個数: 64

約数和(自身を含む): 52747200

約数和(自身を除く): 31764920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1109, 1720, 1892, 2218, 2365, 3784, 4436, 4730, 5545, 8872, 9460, 11090, 12199, 18920, 22180, 24398, 44360, 47687, 48796, 60995, 95374, 97592, 121990, 190748, 238435, 243980, 381496, 476870, 487960, 524557, 953740, 1049114, 1907480, 2098228, 2622785, 4196456, 5245570, 10491140, 20982280]

約数ペア:

[(1, 20982280), (2, 10491140), (4, 5245570), (5, 4196456), (8, 2622785), (10, 2098228), (11, 1907480), (20, 1049114), (22, 953740), (40, 524557), (43, 487960), (44, 476870), (55, 381496), (86, 243980), (88, 238435), (110, 190748), (172, 121990), (215, 97592), (220, 95374), (344, 60995), (430, 48796), (440, 47687), (473, 44360), (860, 24398), (946, 22180), (1109, 18920), (1720, 12199), (1892, 11090), (2218, 9460), (2365, 8872), (3784, 5545), (4436, 4730)]