21421988

素因数分解:

$2^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{7019}}^1$

素因数の和:7139

約数の個数: 24

約数和(自身を含む): 43243200

約数和(自身を除く): 21821212

約数列:

[1, 2, 4, 7, 14, 28, 109, 218, 436, 763, 1526, 3052, 7019, 14038, 28076, 49133, 98266, 196532, 765071, 1530142, 3060284, 5355497, 10710994, 21421988]

約数ペア:

[(1, 21421988), (2, 10710994), (4, 5355497), (7, 3060284), (14, 1530142), (28, 765071), (109, 196532), (218, 98266), (436, 49133), (763, 28076), (1526, 14038), (3052, 7019)]