19977200

素因数分解:

$2^4\times 5^2\times {\mathrm{49943}}^1$

素因数の和:49961

約数の個数: 30

約数和(自身を含む): 47996184

約数和(自身を除く): 28018984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 49943, 99886, 199772, 249715, 399544, 499430, 799088, 998860, 1248575, 1997720, 2497150, 3995440, 4994300, 9988600, 19977200]

約数ペア:

[(1, 19977200), (2, 9988600), (4, 4994300), (5, 3995440), (8, 2497150), (10, 1997720), (16, 1248575), (20, 998860), (25, 799088), (40, 499430), (50, 399544), (80, 249715), (100, 199772), (200, 99886), (400, 49943)]