19994960

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{2293}}^1$

素因数の和:2415

約数の個数: 40

約数和(自身を含む): 46935240

約数和(自身を除く): 26940280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 2293, 4360, 4586, 8720, 9172, 11465, 18344, 22930, 36688, 45860, 91720, 183440, 249937, 499874, 999748, 1249685, 1999496, 2499370, 3998992, 4998740, 9997480, 19994960]

約数ペア:

[(1, 19994960), (2, 9997480), (4, 4998740), (5, 3998992), (8, 2499370), (10, 1999496), (16, 1249685), (20, 999748), (40, 499874), (80, 249937), (109, 183440), (218, 91720), (436, 45860), (545, 36688), (872, 22930), (1090, 18344), (1744, 11465), (2180, 9172), (2293, 8720), (4360, 4586)]