212215521

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{20333}}^1$

素因数の和:20421

約数の個数: 24

約数和(自身を含む): 333802944

約数和(自身を除く): 121587423

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 3479, 10437, 20333, 60999, 142331, 426993, 996317, 1443643, 2988951, 4330929, 10105501, 30316503, 70738507, 212215521]

約数ペア:

[(1, 212215521), (3, 70738507), (7, 30316503), (21, 10105501), (49, 4330929), (71, 2988951), (147, 1443643), (213, 996317), (497, 426993), (1491, 142331), (3479, 60999), (10437, 20333)]