20217555

素因数分解:

$3^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{5413}}^1$

素因数の和:5507

約数の個数: 24

約数和(自身を含む): 35472528

約数和(自身を除く): 15254973

約数列:

[1, 3, 5, 9, 15, 45, 83, 249, 415, 747, 1245, 3735, 5413, 16239, 27065, 48717, 81195, 243585, 449279, 1347837, 2246395, 4043511, 6739185, 20217555]

約数ペア:

[(1, 20217555), (3, 6739185), (5, 4043511), (9, 2246395), (15, 1347837), (45, 449279), (83, 243585), (249, 81195), (415, 48717), (747, 27065), (1245, 16239), (3735, 5413)]