21550460

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12107}}^1$

素因数の和:12205

約数の個数: 24

約数和(自身を含む): 45768240

約数和(自身を除く): 24217780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12107, 24214, 48428, 60535, 121070, 242140, 1077523, 2155046, 4310092, 5387615, 10775230, 21550460]

約数ペア:

[(1, 21550460), (2, 10775230), (4, 5387615), (5, 4310092), (10, 2155046), (20, 1077523), (89, 242140), (178, 121070), (356, 60535), (445, 48428), (890, 24214), (1780, 12107)]