20391777

素因数分解:

$3^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{4691}}^1$

素因数の和:4730

約数の個数: 32

約数和(自身を含む): 36034560

約数和(自身を除く): 15642783

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 161, 189, 207, 483, 621, 1449, 4347, 4691, 14073, 32837, 42219, 98511, 107893, 126657, 295533, 323679, 755251, 886599, 971037, 2265753, 2913111, 6797259, 20391777]

約数ペア:

[(1, 20391777), (3, 6797259), (7, 2913111), (9, 2265753), (21, 971037), (23, 886599), (27, 755251), (63, 323679), (69, 295533), (161, 126657), (189, 107893), (207, 98511), (483, 42219), (621, 32837), (1449, 14073), (4347, 4691)]