21780836

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{70717}}^1$

素因数の和:70739

約数の個数: 24

約数和(自身を含む): 47522496

約数和(自身を除く): 25741660

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 70717, 141434, 282868, 495019, 777887, 990038, 1555774, 1980076, 3111548, 5445209, 10890418, 21780836]

約数ペア:

[(1, 21780836), (2, 10890418), (4, 5445209), (7, 3111548), (11, 1980076), (14, 1555774), (22, 990038), (28, 777887), (44, 495019), (77, 282868), (154, 141434), (308, 70717)]