1820318787

素因数分解:

$3^2\times 7^2\times {\mathrm{4127707}}^1$

素因数の和:4127727

約数の個数: 18

約数和(自身を含む): 3058631628

約数和(自身を除く): 1238312841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 4127707, 12383121, 28893949, 37149363, 86681847, 202257643, 260045541, 606772929, 1820318787]

約数ペア:

[(1, 1820318787), (3, 606772929), (7, 260045541), (9, 202257643), (21, 86681847), (49, 37149363), (63, 28893949), (147, 12383121), (441, 4127707)]