20777480

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{997}}^1$

素因数の和:1529

約数の個数: 32

約数和(自身を含む): 46886040

約数和(自身を除く): 26108560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 997, 1042, 1994, 2084, 2605, 3988, 4168, 4985, 5210, 7976, 9970, 10420, 19940, 20840, 39880, 519437, 1038874, 2077748, 2597185, 4155496, 5194370, 10388740, 20777480]

約数ペア:

[(1, 20777480), (2, 10388740), (4, 5194370), (5, 4155496), (8, 2597185), (10, 2077748), (20, 1038874), (40, 519437), (521, 39880), (997, 20840), (1042, 19940), (1994, 10420), (2084, 9970), (2605, 7976), (3988, 5210), (4168, 4985)]