20010160

素因数分解:

$2^4\times 5^1\times {\mathrm{389}}^1\times {\mathrm{643}}^1$

素因数の和:1045

約数の個数: 40

約数和(自身を含む): 46715760

約数和(自身を除く): 26705600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 389, 643, 778, 1286, 1556, 1945, 2572, 3112, 3215, 3890, 5144, 6224, 6430, 7780, 10288, 12860, 15560, 25720, 31120, 51440, 250127, 500254, 1000508, 1250635, 2001016, 2501270, 4002032, 5002540, 10005080, 20010160]

約数ペア:

[(1, 20010160), (2, 10005080), (4, 5002540), (5, 4002032), (8, 2501270), (10, 2001016), (16, 1250635), (20, 1000508), (40, 500254), (80, 250127), (389, 51440), (643, 31120), (778, 25720), (1286, 15560), (1556, 12860), (1945, 10288), (2572, 7780), (3112, 6430), (3215, 6224), (3890, 5144)]