20405435

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{887}}^1$

素因数の和:1042

約数の個数: 16

約数和(自身を含む): 25318656

約数和(自身を除く): 4913221

約数列:

[1, 5, 43, 107, 215, 535, 887, 4435, 4601, 23005, 38141, 94909, 190705, 474545, 4081087, 20405435]

約数ペア:

[(1, 20405435), (5, 4081087), (43, 474545), (107, 190705), (215, 94909), (535, 38141), (887, 23005), (4435, 4601)]