782020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{641}}^1$

素因数の和:711

約数の個数: 24

約数和(自身を含む): 1671768

約数和(自身を除く): 889748

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 641, 1220, 1282, 2564, 3205, 6410, 12820, 39101, 78202, 156404, 195505, 391010, 782020]

約数ペア:

[(1, 782020), (2, 391010), (4, 195505), (5, 156404), (10, 78202), (20, 39101), (61, 12820), (122, 6410), (244, 3205), (305, 2564), (610, 1282), (641, 1220)]