65688880

素因数分解:

$2^4\times 5^1\times {\mathrm{643}}^1\times {\mathrm{1277}}^1$

素因数の和:1933

約数の個数: 40

約数和(自身を含む): 153083952

約数和(自身を除く): 87395072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 643, 1277, 1286, 2554, 2572, 3215, 5108, 5144, 6385, 6430, 10216, 10288, 12770, 12860, 20432, 25540, 25720, 51080, 51440, 102160, 821111, 1642222, 3284444, 4105555, 6568888, 8211110, 13137776, 16422220, 32844440, 65688880]

約数ペア:

[(1, 65688880), (2, 32844440), (4, 16422220), (5, 13137776), (8, 8211110), (10, 6568888), (16, 4105555), (20, 3284444), (40, 1642222), (80, 821111), (643, 102160), (1277, 51440), (1286, 51080), (2554, 25720), (2572, 25540), (3215, 20432), (5108, 12860), (5144, 12770), (6385, 10288), (6430, 10216)]