640691305

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{251}}^1\times {\mathrm{277}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 823858560

約数和(自身を除く): 183167255

約数列:

[1, 5, 19, 95, 97, 251, 277, 485, 1255, 1385, 1843, 4769, 5263, 9215, 23845, 24347, 26315, 26869, 69527, 121735, 134345, 347635, 462593, 510511, 1321013, 2312965, 2552555, 6605065, 6744119, 33720595, 128138261, 640691305]

約数ペア:

[(1, 640691305), (5, 128138261), (19, 33720595), (95, 6744119), (97, 6605065), (251, 2552555), (277, 2312965), (485, 1321013), (1255, 510511), (1385, 462593), (1843, 347635), (4769, 134345), (5263, 121735), (9215, 69527), (23845, 26869), (24347, 26315)]