87999978

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2067

約数の個数: 64

約数和(自身を含む): 207360000

約数和(自身を除く): 119360022

約数列:

[1, 2, 3, 6, 11, 22, 23, 29, 33, 46, 58, 66, 69, 87, 138, 174, 253, 319, 506, 638, 667, 759, 957, 1334, 1518, 1914, 1999, 2001, 3998, 4002, 5997, 7337, 11994, 14674, 21989, 22011, 43978, 44022, 45977, 57971, 65967, 91954, 115942, 131934, 137931, 173913, 275862, 347826, 505747, 637681, 1011494, 1275362, 1333333, 1517241, 1913043, 2666666, 3034482, 3826086, 3999999, 7999998, 14666663, 29333326, 43999989, 87999978]

約数ペア:

[(1, 87999978), (2, 43999989), (3, 29333326), (6, 14666663), (11, 7999998), (22, 3999999), (23, 3826086), (29, 3034482), (33, 2666666), (46, 1913043), (58, 1517241), (66, 1333333), (69, 1275362), (87, 1011494), (138, 637681), (174, 505747), (253, 347826), (319, 275862), (506, 173913), (638, 137931), (667, 131934), (759, 115942), (957, 91954), (1334, 65967), (1518, 57971), (1914, 45977), (1999, 44022), (2001, 43978), (3998, 22011), (4002, 21989), (5997, 14674), (7337, 11994)]