21720429

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{613}}^1$

素因数の和:777

約数の個数: 24

約数和(自身を含む): 32694272

約数和(自身を除く): 10973843

約数列:

[1, 3, 9, 31, 93, 127, 279, 381, 613, 1143, 1839, 3937, 5517, 11811, 19003, 35433, 57009, 77851, 171027, 233553, 700659, 2413381, 7240143, 21720429]

約数ペア:

[(1, 21720429), (3, 7240143), (9, 2413381), (31, 700659), (93, 233553), (127, 171027), (279, 77851), (381, 57009), (613, 35433), (1143, 19003), (1839, 11811), (3937, 5517)]