21752731

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{701}}^1$

素因数の和:763

約数の個数: 32

約数和(自身を含む): 30191616

約数和(自身を除く): 8438885

約数列:

[1, 7, 11, 13, 31, 77, 91, 143, 217, 341, 403, 701, 1001, 2387, 2821, 4433, 4907, 7711, 9113, 21731, 31031, 53977, 63791, 100243, 152117, 239041, 282503, 701701, 1673287, 1977521, 3107533, 21752731]

約数ペア:

[(1, 21752731), (7, 3107533), (11, 1977521), (13, 1673287), (31, 701701), (77, 282503), (91, 239041), (143, 152117), (217, 100243), (341, 63791), (403, 53977), (701, 31031), (1001, 21731), (2387, 9113), (2821, 7711), (4433, 4907)]