20918619

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{2909}}^1$

素因数の和:2979

約数の個数: 24

約数和(自身を含む): 32685120

約数和(自身を除く): 11766501

約数列:

[1, 3, 9, 17, 47, 51, 141, 153, 423, 799, 2397, 2909, 7191, 8727, 26181, 49453, 136723, 148359, 410169, 445077, 1230507, 2324291, 6972873, 20918619]

約数ペア:

[(1, 20918619), (3, 6972873), (9, 2324291), (17, 1230507), (47, 445077), (51, 410169), (141, 148359), (153, 136723), (423, 49453), (799, 26181), (2397, 8727), (2909, 7191)]