21780944

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{80077}}^1$

素因数の和:80102

約数の個数: 20

約数和(自身を含む): 44683524

約数和(自身を除く): 22902580

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 80077, 160154, 320308, 640616, 1281232, 1361309, 2722618, 5445236, 10890472, 21780944]

約数ペア:

[(1, 21780944), (2, 10890472), (4, 5445236), (8, 2722618), (16, 1361309), (17, 1281232), (34, 640616), (68, 320308), (136, 160154), (272, 80077)]