21031888

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{42403}}^1$

素因数の和:42442

約数の個数: 20

約数和(自身を含む): 42064768

約数和(自身を除く): 21032880

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 42403, 84806, 169612, 339224, 678448, 1314493, 2628986, 5257972, 10515944, 21031888]

約数ペア:

[(1, 21031888), (2, 10515944), (4, 5257972), (8, 2628986), (16, 1314493), (31, 678448), (62, 339224), (124, 169612), (248, 84806), (496, 42403)]