20820290

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{90523}}^1$

素因数の和:90553

約数の個数: 16

約数和(自身を含む): 39106368

約数和(自身を除く): 18286078

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 90523, 181046, 452615, 905230, 2082029, 4164058, 10410145, 20820290]

約数ペア:

[(1, 20820290), (2, 10410145), (5, 4164058), (10, 2082029), (23, 905230), (46, 452615), (115, 181046), (230, 90523)]