21812720

素因数分解:

$2^4\times 5^1\times {\mathrm{272659}}^1$

素因数の和:272672

約数の個数: 20

約数和(自身を含む): 50714760

約数和(自身を除く): 28902040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272659, 545318, 1090636, 1363295, 2181272, 2726590, 4362544, 5453180, 10906360, 21812720]

約数ペア:

[(1, 21812720), (2, 10906360), (4, 5453180), (5, 4362544), (8, 2726590), (10, 2181272), (16, 1363295), (20, 1090636), (40, 545318), (80, 272659)]