18702520

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{937}}^1$

素因数の和:1447

約数の個数: 32

約数和(自身を含む): 42210000

約数和(自身を除く): 23507480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 937, 998, 1874, 1996, 2495, 3748, 3992, 4685, 4990, 7496, 9370, 9980, 18740, 19960, 37480, 467563, 935126, 1870252, 2337815, 3740504, 4675630, 9351260, 18702520]

約数ペア:

[(1, 18702520), (2, 9351260), (4, 4675630), (5, 3740504), (8, 2337815), (10, 1870252), (20, 935126), (40, 467563), (499, 37480), (937, 19960), (998, 18740), (1874, 9980), (1996, 9370), (2495, 7496), (3748, 4990), (3992, 4685)]