642635

素因数分解:

$5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 24

約数和(自身を含む): 932976

約数和(自身を除く): 290341

約数列:

[1, 5, 7, 35, 43, 49, 61, 215, 245, 301, 305, 427, 1505, 2107, 2135, 2623, 2989, 10535, 13115, 14945, 18361, 91805, 128527, 642635]

約数ペア:

[(1, 642635), (5, 128527), (7, 91805), (35, 18361), (43, 14945), (49, 13115), (61, 10535), (215, 2989), (245, 2623), (301, 2135), (305, 2107), (427, 1505)]