2020101580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{389981}}^1$

素因数の和:390034

約数の個数: 48

約数和(自身を含む): 4979290176

約数和(自身を除く): 2959188596

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 5180, 389981, 779962, 1559924, 1949905, 2729867, 3899810, 5459734, 7799620, 10919468, 13649335, 14429297, 27298670, 28858594, 54597340, 57717188, 72146485, 101005079, 144292970, 202010158, 288585940, 404020316, 505025395, 1010050790, 2020101580]

約数ペア:

[(1, 2020101580), (2, 1010050790), (4, 505025395), (5, 404020316), (7, 288585940), (10, 202010158), (14, 144292970), (20, 101005079), (28, 72146485), (35, 57717188), (37, 54597340), (70, 28858594), (74, 27298670), (140, 14429297), (148, 13649335), (185, 10919468), (259, 7799620), (370, 5459734), (518, 3899810), (740, 2729867), (1036, 1949905), (1295, 1559924), (2590, 779962), (5180, 389981)]