19886960

素因数分解:

$2^4\times 5^1\times {\mathrm{248587}}^1$

素因数の和:248600

約数の個数: 20

約数和(自身を含む): 46237368

約数和(自身を除く): 26350408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248587, 497174, 994348, 1242935, 1988696, 2485870, 3977392, 4971740, 9943480, 19886960]

約数ペア:

[(1, 19886960), (2, 9943480), (4, 4971740), (5, 3977392), (8, 2485870), (10, 1988696), (16, 1242935), (20, 994348), (40, 497174), (80, 248587)]