28657503

素因数分解:

$3^3\times 7^2\times {\mathrm{21661}}^1$

素因数の和:21684

約数の個数: 24

約数和(自身を含む): 49389360

約数和(自身を除く): 20731857

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 21661, 64983, 151627, 194949, 454881, 584847, 1061389, 1364643, 3184167, 4093929, 9552501, 28657503]

約数ペア:

[(1, 28657503), (3, 9552501), (7, 4093929), (9, 3184167), (21, 1364643), (27, 1061389), (49, 584847), (63, 454881), (147, 194949), (189, 151627), (441, 64983), (1323, 21661)]