21657681

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{293}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 32288256

約数和(自身を除く): 10630575

約数列:

[1, 3, 9, 43, 129, 191, 293, 387, 573, 879, 1719, 2637, 8213, 12599, 24639, 37797, 55963, 73917, 113391, 167889, 503667, 2406409, 7219227, 21657681]

約数ペア:

[(1, 21657681), (3, 7219227), (9, 2406409), (43, 503667), (129, 167889), (191, 113391), (293, 73917), (387, 55963), (573, 37797), (879, 24639), (1719, 12599), (2637, 8213)]