20217568

素因数分解:

$2^5\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2099}}^1$

素因数の和:2159

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 26352032

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 56, 86, 112, 172, 224, 301, 344, 602, 688, 1204, 1376, 2099, 2408, 4198, 4816, 8396, 9632, 14693, 16792, 29386, 33584, 58772, 67168, 90257, 117544, 180514, 235088, 361028, 470176, 631799, 722056, 1263598, 1444112, 2527196, 2888224, 5054392, 10108784, 20217568]

約数ペア:

[(1, 20217568), (2, 10108784), (4, 5054392), (7, 2888224), (8, 2527196), (14, 1444112), (16, 1263598), (28, 722056), (32, 631799), (43, 470176), (56, 361028), (86, 235088), (112, 180514), (172, 117544), (224, 90257), (301, 67168), (344, 58772), (602, 33584), (688, 29386), (1204, 16792), (1376, 14693), (2099, 9632), (2408, 8396), (4198, 4816)]