21688856

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{9007}}^1$

素因数の和:9063

約数の個数: 32

約数和(自身を含む): 47562240

約数和(自身を除く): 25873384

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 86, 172, 301, 344, 602, 1204, 2408, 9007, 18014, 36028, 63049, 72056, 126098, 252196, 387301, 504392, 774602, 1549204, 2711107, 3098408, 5422214, 10844428, 21688856]

約数ペア:

[(1, 21688856), (2, 10844428), (4, 5422214), (7, 3098408), (8, 2711107), (14, 1549204), (28, 774602), (43, 504392), (56, 387301), (86, 252196), (172, 126098), (301, 72056), (344, 63049), (602, 36028), (1204, 18014), (2408, 9007)]