31297581

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{6997}}^1$

素因数の和:7081

約数の個数: 24

約数和(自身を含む): 52401024

約数和(自身を除く): 21103443

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 6997, 20991, 48979, 62973, 146937, 440811, 496787, 1490361, 3477509, 4471083, 10432527, 31297581]

約数ペア:

[(1, 31297581), (3, 10432527), (7, 4471083), (9, 3477509), (21, 1490361), (63, 496787), (71, 440811), (213, 146937), (497, 62973), (639, 48979), (1491, 20991), (4473, 6997)]