20403909

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{863}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 30730752

約数和(自身を除く): 10326843

約数列:

[1, 3, 9, 37, 71, 111, 213, 333, 639, 863, 2589, 2627, 7767, 7881, 23643, 31931, 61273, 95793, 183819, 287379, 551457, 2267101, 6801303, 20403909]

約数ペア:

[(1, 20403909), (3, 6801303), (9, 2267101), (37, 551457), (71, 287379), (111, 183819), (213, 95793), (333, 61273), (639, 31931), (863, 23643), (2589, 7881), (2627, 7767)]