81287180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312643}}^1$

素因数の和:312665

約数の個数: 24

約数和(自身を含む): 183834672

約数和(自身を除く): 102547492

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312643, 625286, 1250572, 1563215, 3126430, 4064359, 6252860, 8128718, 16257436, 20321795, 40643590, 81287180]

約数ペア:

[(1, 81287180), (2, 40643590), (4, 20321795), (5, 16257436), (10, 8128718), (13, 6252860), (20, 4064359), (26, 3126430), (52, 1563215), (65, 1250572), (130, 625286), (260, 312643)]