21257740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151841}}^1$

素因数の和:151857

約数の個数: 24

約数和(自身を含む): 51018912

約数和(自身を除く): 29761172

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151841, 303682, 607364, 759205, 1062887, 1518410, 2125774, 3036820, 4251548, 5314435, 10628870, 21257740]

約数ペア:

[(1, 21257740), (2, 10628870), (4, 5314435), (5, 4251548), (7, 3036820), (10, 2125774), (14, 1518410), (20, 1062887), (28, 759205), (35, 607364), (70, 303682), (140, 151841)]