21008565

素因数分解:

$3^5\times 5^1\times {\mathrm{17291}}^1$

素因数の和:17311

約数の個数: 24

約数和(自身を含む): 37765728

約数和(自身を除く): 16757163

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17291, 51873, 86455, 155619, 259365, 466857, 778095, 1400571, 2334285, 4201713, 7002855, 21008565]

約数ペア:

[(1, 21008565), (3, 7002855), (5, 4201713), (9, 2334285), (15, 1400571), (27, 778095), (45, 466857), (81, 259365), (135, 155619), (243, 86455), (405, 51873), (1215, 17291)]