28920185

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{277}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 42167040

約数和(自身を除く): 13246855

約数列:

[1, 5, 7, 19, 35, 95, 133, 157, 277, 665, 785, 1099, 1385, 1939, 2983, 5263, 5495, 9695, 14915, 20881, 26315, 36841, 43489, 104405, 184205, 217445, 304423, 826291, 1522115, 4131455, 5784037, 28920185]

約数ペア:

[(1, 28920185), (5, 5784037), (7, 4131455), (19, 1522115), (35, 826291), (95, 304423), (133, 217445), (157, 184205), (277, 104405), (665, 43489), (785, 36841), (1099, 26315), (1385, 20881), (1939, 14915), (2983, 9695), (5263, 5495)]