21497877

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1979}}^1$

素因数の和:2073

約数の個数: 24

約数和(自身を含む): 33359040

約数和(自身を除く): 11861163

約数列:

[1, 3, 9, 17, 51, 71, 153, 213, 639, 1207, 1979, 3621, 5937, 10863, 17811, 33643, 100929, 140509, 302787, 421527, 1264581, 2388653, 7165959, 21497877]

約数ペア:

[(1, 21497877), (3, 7165959), (9, 2388653), (17, 1264581), (51, 421527), (71, 302787), (153, 140509), (213, 100929), (639, 33643), (1207, 17811), (1979, 10863), (3621, 5937)]