2781961

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1609}}^1$

素因数の和:1648

約数の個数: 16

約数和(自身を含む): 3606400

約数和(自身を除く): 824439

約数列:

[1, 7, 13, 19, 91, 133, 247, 1609, 1729, 11263, 20917, 30571, 146419, 213997, 397423, 2781961]

約数ペア:

[(1, 2781961), (7, 397423), (13, 213997), (19, 146419), (91, 30571), (133, 20917), (247, 11263), (1609, 1729)]