20191689

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4057}}^1$

素因数の和:4149

約数の個数: 24

約数和(自身を含む): 33762560

約数和(自身を除く): 13570871

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4057, 4977, 12171, 28399, 36513, 85197, 255591, 320503, 961509, 2243521, 2884527, 6730563, 20191689]

約数ペア:

[(1, 20191689), (3, 6730563), (7, 2884527), (9, 2243521), (21, 961509), (63, 320503), (79, 255591), (237, 85197), (553, 36513), (711, 28399), (1659, 12171), (4057, 4977)]