20831785

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{277}}^1$

素因数の和:397

約数の個数: 24

約数和(自身を含む): 27471960

約数和(自身を除く): 6640175

約数列:

[1, 5, 13, 65, 89, 169, 277, 445, 845, 1157, 1385, 3601, 5785, 15041, 18005, 24653, 46813, 75205, 123265, 234065, 320489, 1602445, 4166357, 20831785]

約数ペア:

[(1, 20831785), (5, 4166357), (13, 1602445), (65, 320489), (89, 234065), (169, 123265), (277, 75205), (445, 46813), (845, 24653), (1157, 18005), (1385, 15041), (3601, 5785)]