21688688

素因数分解:

$2^4\times 7^1\times {\mathrm{193649}}^1$

素因数の和:193664

約数の個数: 20

約数和(自身を含む): 48025200

約数和(自身を除く): 26336512

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 193649, 387298, 774596, 1355543, 1549192, 2711086, 3098384, 5422172, 10844344, 21688688]

約数ペア:

[(1, 21688688), (2, 10844344), (4, 5422172), (7, 3098384), (8, 2711086), (14, 1549192), (16, 1355543), (28, 774596), (56, 387298), (112, 193649)]