20806905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2791}}^1$

素因数の和:2877

約数の個数: 32

約数和(自身を含む): 38596608

約数和(自身を除く): 17789703

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2791, 7455, 8373, 13955, 19537, 41865, 58611, 97685, 198161, 293055, 594483, 990805, 1387127, 2972415, 4161381, 6935635, 20806905]

約数ペア:

[(1, 20806905), (3, 6935635), (5, 4161381), (7, 2972415), (15, 1387127), (21, 990805), (35, 594483), (71, 293055), (105, 198161), (213, 97685), (355, 58611), (497, 41865), (1065, 19537), (1491, 13955), (2485, 8373), (2791, 7455)]