640620765

素因数分解:

$3^3\times 5^1\times {\mathrm{4745339}}^1$

素因数の和:4745353

約数の個数: 16

約数和(自身を含む): 1138881600

約数和(自身を除く): 498260835

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 4745339, 14236017, 23726695, 42708051, 71180085, 128124153, 213540255, 640620765]

約数ペア:

[(1, 640620765), (3, 213540255), (5, 128124153), (9, 71180085), (15, 42708051), (27, 23726695), (45, 14236017), (135, 4745339)]