28720713

素因数分解:

$3^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{4157}}^1$

素因数の和:4221

約数の個数: 24

約数和(自身を含む): 45505152

約数和(自身を除く): 16784439

約数列:

[1, 3, 7, 21, 47, 49, 141, 147, 329, 987, 2303, 4157, 6909, 12471, 29099, 87297, 195379, 203693, 586137, 611079, 1367653, 4102959, 9573571, 28720713]

約数ペア:

[(1, 28720713), (3, 9573571), (7, 4102959), (21, 1367653), (47, 611079), (49, 586137), (141, 203693), (147, 195379), (329, 87297), (987, 29099), (2303, 12471), (4157, 6909)]