21166928

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:399

約数の個数: 40

約数和(自身を含む): 42352200

約数和(自身を除く): 21185272

約数列:

[1, 2, 4, 8, 16, 53, 106, 109, 212, 218, 229, 424, 436, 458, 848, 872, 916, 1744, 1832, 3664, 5777, 11554, 12137, 23108, 24274, 24961, 46216, 48548, 49922, 92432, 97096, 99844, 194192, 199688, 399376, 1322933, 2645866, 5291732, 10583464, 21166928]

約数ペア:

[(1, 21166928), (2, 10583464), (4, 5291732), (8, 2645866), (16, 1322933), (53, 399376), (106, 199688), (109, 194192), (212, 99844), (218, 97096), (229, 92432), (424, 49922), (436, 48548), (458, 46216), (848, 24961), (872, 24274), (916, 23108), (1744, 12137), (1832, 11554), (3664, 5777)]