21780752

素因数分解:

$2^4\times 7^1\times {\mathrm{194471}}^1$

素因数の和:194486

約数の個数: 20

約数和(自身を含む): 48229056

約数和(自身を除く): 26448304

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 194471, 388942, 777884, 1361297, 1555768, 2722594, 3111536, 5445188, 10890376, 21780752]

約数ペア:

[(1, 21780752), (2, 10890376), (4, 5445188), (7, 3111536), (8, 2722594), (14, 1555768), (16, 1361297), (28, 777884), (56, 388942), (112, 194471)]