21992180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22441}}^1$

素因数の和:22464

約数の個数: 36

約数和(自身を含む): 53726148

約数和(自身を除く): 31733968

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22441, 44882, 89764, 112205, 157087, 224410, 314174, 448820, 628348, 785435, 1099609, 1570870, 2199218, 3141740, 4398436, 5498045, 10996090, 21992180]

約数ペア:

[(1, 21992180), (2, 10996090), (4, 5498045), (5, 4398436), (7, 3141740), (10, 2199218), (14, 1570870), (20, 1099609), (28, 785435), (35, 628348), (49, 448820), (70, 314174), (98, 224410), (140, 157087), (196, 112205), (245, 89764), (490, 44882), (980, 22441)]