21781144784

素因数分解:

$2^4\times 7^1\times {\mathrm{194474507}}^1$

素因数の和:194474522

約数の個数: 20

約数和(自身を含む): 48229677984

約数和(自身を除く): 26448533200

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 194474507, 388949014, 777898028, 1361321549, 1555796056, 2722643098, 3111592112, 5445286196, 10890572392, 21781144784]

約数ペア:

[(1, 21781144784), (2, 10890572392), (4, 5445286196), (7, 3111592112), (8, 2722643098), (14, 1555796056), (16, 1361321549), (28, 777898028), (56, 388949014), (112, 194474507)]