21246320

素因数分解:

$2^4\times 5^1\times {\mathrm{265579}}^1$

素因数の和:265592

約数の個数: 20

約数和(自身を含む): 49397880

約数和(自身を除く): 28151560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265579, 531158, 1062316, 1327895, 2124632, 2655790, 4249264, 5311580, 10623160, 21246320]

約数ペア:

[(1, 21246320), (2, 10623160), (4, 5311580), (5, 4249264), (8, 2655790), (10, 2124632), (16, 1327895), (20, 1062316), (40, 531158), (80, 265579)]