81639657

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{1553}}^1$

素因数の和:1635

約数の個数: 40

約数和(自身を含む): 135384480

約数和(自身を除く): 53744823

約数列:

[1, 3, 9, 11, 27, 33, 59, 81, 99, 177, 297, 531, 649, 891, 1553, 1593, 1947, 4659, 4779, 5841, 13977, 17083, 17523, 41931, 51249, 52569, 91627, 125793, 153747, 274881, 461241, 824643, 1007897, 1383723, 2473929, 3023691, 7421787, 9071073, 27213219, 81639657]

約数ペア:

[(1, 81639657), (3, 27213219), (9, 9071073), (11, 7421787), (27, 3023691), (33, 2473929), (59, 1383723), (81, 1007897), (99, 824643), (177, 461241), (297, 274881), (531, 153747), (649, 125793), (891, 91627), (1553, 52569), (1593, 51249), (1947, 41931), (4659, 17523), (4779, 17083), (5841, 13977)]