21299248

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:365

約数の個数: 40

約数和(自身を含む): 42514640

約数和(自身を除く): 21215392

約数列:

[1, 2, 4, 8, 16, 61, 122, 139, 157, 244, 278, 314, 488, 556, 628, 976, 1112, 1256, 2224, 2512, 8479, 9577, 16958, 19154, 21823, 33916, 38308, 43646, 67832, 76616, 87292, 135664, 153232, 174584, 349168, 1331203, 2662406, 5324812, 10649624, 21299248]

約数ペア:

[(1, 21299248), (2, 10649624), (4, 5324812), (8, 2662406), (16, 1331203), (61, 349168), (122, 174584), (139, 153232), (157, 135664), (244, 87292), (278, 76616), (314, 67832), (488, 43646), (556, 38308), (628, 33916), (976, 21823), (1112, 19154), (1256, 16958), (2224, 9577), (2512, 8479)]