81717237

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{18269}}^1$

素因数の和:18353

約数の個数: 24

約数和(自身を含む): 136805760

約数和(自身を除く): 55088523

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 18269, 54807, 127883, 164421, 383649, 1150947, 1297099, 3891297, 9079693, 11673891, 27239079, 81717237]

約数ペア:

[(1, 81717237), (3, 27239079), (7, 11673891), (9, 9079693), (21, 3891297), (63, 1297099), (71, 1150947), (213, 383649), (497, 164421), (639, 127883), (1491, 54807), (4473, 18269)]