19784961

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{3049}}^1$

素因数の和:3165

約数の個数: 24

約数和(自身を含む): 32988800

約数和(自身を除く): 13203839

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 3049, 6489, 9147, 21343, 27441, 64029, 192087, 314047, 942141, 2198329, 2826423, 6594987, 19784961]

約数ペア:

[(1, 19784961), (3, 6594987), (7, 2826423), (9, 2198329), (21, 942141), (63, 314047), (103, 192087), (309, 64029), (721, 27441), (927, 21343), (2163, 9147), (3049, 6489)]