21961990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{75731}}^1$

素因数の和:75767

約数の個数: 16

約数和(自身を含む): 40895280

約数和(自身を除く): 18933290

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 75731, 151462, 378655, 757310, 2196199, 4392398, 10980995, 21961990]

約数ペア:

[(1, 21961990), (2, 10980995), (5, 4392398), (10, 2196199), (29, 757310), (58, 378655), (145, 151462), (290, 75731)]