81218739

素因数分解:

$3^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{20249}}^1$

素因数の和:20450

約数の個数: 16

約数和(自身を含む): 124416000

約数和(自身を除く): 43197261

約数列:

[1, 3, 7, 21, 191, 573, 1337, 4011, 20249, 60747, 141743, 425229, 3867559, 11602677, 27072913, 81218739]

約数ペア:

[(1, 81218739), (3, 27072913), (7, 11602677), (21, 3867559), (191, 425229), (573, 141743), (1337, 60747), (4011, 20249)]