21828140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12263}}^1$

素因数の和:12361

約数の個数: 24

約数和(自身を含む): 46357920

約数和(自身を除く): 24529780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12263, 24526, 49052, 61315, 122630, 245260, 1091407, 2182814, 4365628, 5457035, 10914070, 21828140]

約数ペア:

[(1, 21828140), (2, 10914070), (4, 5457035), (5, 4365628), (10, 2182814), (20, 1091407), (89, 245260), (178, 122630), (356, 61315), (445, 49052), (890, 24526), (1780, 12263)]