21011985

素因数分解:

$3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1723}}^1$

素因数の和:2005

約数の個数: 24

約数和(自身を含む): 36576384

約数和(自身を除く): 15564399

約数列:

[1, 3, 5, 9, 15, 45, 271, 813, 1355, 1723, 2439, 4065, 5169, 8615, 12195, 15507, 25845, 77535, 466933, 1400799, 2334665, 4202397, 7003995, 21011985]

約数ペア:

[(1, 21011985), (3, 7003995), (5, 4202397), (9, 2334665), (15, 1400799), (45, 466933), (271, 77535), (813, 25845), (1355, 15507), (1723, 12195), (2439, 8615), (4065, 5169)]