21057788

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{5323}}^1$

素因数の和:5393

約数の個数: 24

約数和(自身を含む): 39355008

約数和(自身を除く): 18297220

約数列:

[1, 2, 4, 23, 43, 46, 86, 92, 172, 989, 1978, 3956, 5323, 10646, 21292, 122429, 228889, 244858, 457778, 489716, 915556, 5264447, 10528894, 21057788]

約数ペア:

[(1, 21057788), (2, 10528894), (4, 5264447), (23, 915556), (43, 489716), (46, 457778), (86, 244858), (92, 228889), (172, 122429), (989, 21292), (1978, 10646), (3956, 5323)]