20981247

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{58771}}^1$

素因数の和:58798

約数の個数: 16

約数和(自身を含む): 33852672

約数和(自身を除く): 12871425

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 58771, 176313, 411397, 999107, 1234191, 2997321, 6993749, 20981247]

約数ペア:

[(1, 20981247), (3, 6993749), (7, 2997321), (17, 1234191), (21, 999107), (51, 411397), (119, 176313), (357, 58771)]