21551990

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27281}}^1$

素因数の和:27367

約数の個数: 16

約数和(自身を含む): 39286080

約数和(自身を除く): 17734090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27281, 54562, 136405, 272810, 2155199, 4310398, 10775995, 21551990]

約数ペア:

[(1, 21551990), (2, 10775995), (5, 4310398), (10, 2155199), (79, 272810), (158, 136405), (395, 54562), (790, 27281)]