21643405

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 30945024

約数和(自身を除く): 9301619

約数列:

[1, 5, 7, 35, 43, 73, 197, 215, 301, 365, 511, 985, 1379, 1505, 2555, 3139, 6895, 8471, 14381, 15695, 21973, 42355, 59297, 71905, 100667, 109865, 296485, 503335, 618383, 3091915, 4328681, 21643405]

約数ペア:

[(1, 21643405), (5, 4328681), (7, 3091915), (35, 618383), (43, 503335), (73, 296485), (197, 109865), (215, 100667), (301, 71905), (365, 59297), (511, 42355), (985, 21973), (1379, 15695), (1505, 14381), (2555, 8471), (3139, 6895)]