21144080

素因数分解:

$2^4\times 5^1\times {\mathrm{264301}}^1$

素因数の和:264314

約数の個数: 20

約数和(自身を含む): 49160172

約数和(自身を除く): 28016092

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264301, 528602, 1057204, 1321505, 2114408, 2643010, 4228816, 5286020, 10572040, 21144080]

約数ペア:

[(1, 21144080), (2, 10572040), (4, 5286020), (5, 4228816), (8, 2643010), (10, 2114408), (16, 1321505), (20, 1057204), (40, 528602), (80, 264301)]