20087960

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1291}}^1$

素因数の和:1691

約数の個数: 32

約数和(自身を含む): 45349200

約数和(自身を除く): 25261240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1291, 1556, 1945, 2582, 3112, 3890, 5164, 6455, 7780, 10328, 12910, 15560, 25820, 51640, 502199, 1004398, 2008796, 2510995, 4017592, 5021990, 10043980, 20087960]

約数ペア:

[(1, 20087960), (2, 10043980), (4, 5021990), (5, 4017592), (8, 2510995), (10, 2008796), (20, 1004398), (40, 502199), (389, 51640), (778, 25820), (1291, 15560), (1556, 12910), (1945, 10328), (2582, 7780), (3112, 6455), (3890, 5164)]