20666217

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{719}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 12234903

約数列:

[1, 3, 11, 13, 33, 39, 67, 143, 201, 429, 719, 737, 871, 2157, 2211, 2613, 7909, 9347, 9581, 23727, 28041, 28743, 48173, 102817, 144519, 308451, 529903, 626249, 1589709, 1878747, 6888739, 20666217]

約数ペア:

[(1, 20666217), (3, 6888739), (11, 1878747), (13, 1589709), (33, 626249), (39, 529903), (67, 308451), (143, 144519), (201, 102817), (429, 48173), (719, 28743), (737, 28041), (871, 23727), (2157, 9581), (2211, 9347), (2613, 7909)]