19802881

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{487}}^1$

素因数の和:688

約数の個数: 16

約数和(自身を含む): 23439616

約数和(自身を除く): 3636735

約数列:

[1, 7, 37, 157, 259, 487, 1099, 3409, 5809, 18019, 40663, 76459, 126133, 535213, 2828983, 19802881]

約数ペア:

[(1, 19802881), (7, 2828983), (37, 535213), (157, 126133), (259, 76459), (487, 40663), (1099, 18019), (3409, 5809)]