21778310

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5431}}^1$

素因数の和:5839

約数の個数: 16

約数和(自身を含む): 39305952

約数和(自身を除く): 17527642

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5431, 10862, 27155, 54310, 2177831, 4355662, 10889155, 21778310]

約数ペア:

[(1, 21778310), (2, 10889155), (5, 4355662), (10, 2177831), (401, 54310), (802, 27155), (2005, 10862), (4010, 5431)]