19988360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71387}}^1$

素因数の和:71405

約数の個数: 32

約数和(自身を含む): 51399360

約数和(自身を除く): 31411000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 71387, 142774, 285548, 356935, 499709, 571096, 713870, 999418, 1427740, 1998836, 2498545, 2855480, 3997672, 4997090, 9994180, 19988360]

約数ペア:

[(1, 19988360), (2, 9994180), (4, 4997090), (5, 3997672), (7, 2855480), (8, 2498545), (10, 1998836), (14, 1427740), (20, 999418), (28, 713870), (35, 571096), (40, 499709), (56, 356935), (70, 285548), (140, 142774), (280, 71387)]