21655976

素因数分解:

$2^3\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 20008024

約数列:

[1, 2, 4, 8, 61, 122, 199, 223, 244, 398, 446, 488, 796, 892, 1592, 1784, 12139, 13603, 24278, 27206, 44377, 48556, 54412, 88754, 97112, 108824, 177508, 355016, 2706997, 5413994, 10827988, 21655976]

約数ペア:

[(1, 21655976), (2, 10827988), (4, 5413994), (8, 2706997), (61, 355016), (122, 177508), (199, 108824), (223, 97112), (244, 88754), (398, 54412), (446, 48556), (488, 44377), (796, 27206), (892, 24278), (1592, 13603), (1784, 12139)]