21042447

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{17939}}^1$

素因数の和:17982

約数の個数: 16

約数和(自身を含む): 31000320

約数和(自身を除く): 9957873

約数列:

[1, 3, 17, 23, 51, 69, 391, 1173, 17939, 53817, 304963, 412597, 914889, 1237791, 7014149, 21042447]

約数ペア:

[(1, 21042447), (3, 7014149), (17, 1237791), (23, 914889), (51, 412597), (69, 304963), (391, 53817), (1173, 17939)]