20765521

素因数分解:

$7^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1\times {\mathrm{347}}^1$

素因数の和:540

約数の個数: 16

約数和(自身を含む): 24321024

約数和(自身を除く): 3555503

約数列:

[1, 7, 83, 103, 347, 581, 721, 2429, 8549, 28801, 35741, 59843, 201607, 250187, 2966503, 20765521]

約数ペア:

[(1, 20765521), (7, 2966503), (83, 250187), (103, 201607), (347, 59843), (581, 35741), (721, 28801), (2429, 8549)]