20028267

素因数分解:

$3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1237}}^1$

素因数の和:1507

約数の個数: 24

約数和(自身を含む): 33218016

約数和(自身を除く): 13189749

約数列:

[1, 3, 7, 9, 21, 63, 257, 771, 1237, 1799, 2313, 3711, 5397, 8659, 11133, 16191, 25977, 77931, 317909, 953727, 2225363, 2861181, 6676089, 20028267]

約数ペア:

[(1, 20028267), (3, 6676089), (7, 2861181), (9, 2225363), (21, 953727), (63, 317909), (257, 77931), (771, 25977), (1237, 16191), (1799, 11133), (2313, 8659), (3711, 5397)]