18640090

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{349}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 39501000

約数和(自身を除く): 20860910

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 109, 218, 245, 349, 490, 545, 698, 763, 1090, 1526, 1745, 2443, 3490, 3815, 4886, 5341, 7630, 10682, 12215, 17101, 24430, 26705, 34202, 38041, 53410, 76082, 85505, 171010, 190205, 266287, 380410, 532574, 1331435, 1864009, 2662870, 3728018, 9320045, 18640090]

約数ペア:

[(1, 18640090), (2, 9320045), (5, 3728018), (7, 2662870), (10, 1864009), (14, 1331435), (35, 532574), (49, 380410), (70, 266287), (98, 190205), (109, 171010), (218, 85505), (245, 76082), (349, 53410), (490, 38041), (545, 34202), (698, 26705), (763, 24430), (1090, 17101), (1526, 12215), (1745, 10682), (2443, 7630), (3490, 5341), (3815, 4886)]