21090448

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{257}}^1$

素因数の和:511

約数の個数: 40

約数和(自身を含む): 42997248

約数和(自身を除く): 21906800

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 184, 223, 257, 368, 446, 514, 892, 1028, 1784, 2056, 3568, 4112, 5129, 5911, 10258, 11822, 20516, 23644, 41032, 47288, 57311, 82064, 94576, 114622, 229244, 458488, 916976, 1318153, 2636306, 5272612, 10545224, 21090448]

約数ペア:

[(1, 21090448), (2, 10545224), (4, 5272612), (8, 2636306), (16, 1318153), (23, 916976), (46, 458488), (92, 229244), (184, 114622), (223, 94576), (257, 82064), (368, 57311), (446, 47288), (514, 41032), (892, 23644), (1028, 20516), (1784, 11822), (2056, 10258), (3568, 5911), (4112, 5129)]