128440305

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{407747}}^1$

素因数の和:407765

約数の個数: 24

約数和(自身を含む): 254434752

約数和(自身を除く): 125994447

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 407747, 1223241, 2038735, 2854229, 3669723, 6116205, 8562687, 14271145, 18348615, 25688061, 42813435, 128440305]

約数ペア:

[(1, 128440305), (3, 42813435), (5, 25688061), (7, 18348615), (9, 14271145), (15, 8562687), (21, 6116205), (35, 3669723), (45, 2854229), (63, 2038735), (105, 1223241), (315, 407747)]