21137715

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27631}}^1$

素因数の和:27659

約数の個数: 24

約数和(自身を含む): 38795328

約数和(自身を除く): 17657613

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27631, 82893, 138155, 248679, 414465, 469727, 1243395, 1409181, 2348635, 4227543, 7045905, 21137715]

約数ペア:

[(1, 21137715), (3, 7045905), (5, 4227543), (9, 2348635), (15, 1409181), (17, 1243395), (45, 469727), (51, 414465), (85, 248679), (153, 138155), (255, 82893), (765, 27631)]