21005235

素因数分解:

$3^2\times 5^1\times {\mathrm{607}}^1\times {\mathrm{769}}^1$

素因数の和:1387

約数の個数: 24

約数和(自身を含む): 36516480

約数和(自身を除く): 15511245

約数列:

[1, 3, 5, 9, 15, 45, 607, 769, 1821, 2307, 3035, 3845, 5463, 6921, 9105, 11535, 27315, 34605, 466783, 1400349, 2333915, 4201047, 7001745, 21005235]

約数ペア:

[(1, 21005235), (3, 7001745), (5, 4201047), (9, 2333915), (15, 1400349), (45, 466783), (607, 34605), (769, 27315), (1821, 11535), (2307, 9105), (3035, 6921), (3845, 5463)]