21478940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153421}}^1$

素因数の和:153437

約数の個数: 24

約数和(自身を含む): 51549792

約数和(自身を除く): 30070852

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153421, 306842, 613684, 767105, 1073947, 1534210, 2147894, 3068420, 4295788, 5369735, 10739470, 21478940]

約数ペア:

[(1, 21478940), (2, 10739470), (4, 5369735), (5, 4295788), (7, 3068420), (10, 2147894), (14, 1534210), (20, 1073947), (28, 767105), (35, 613684), (70, 306842), (140, 153421)]