21653360

素因数分解:

$2^4\times 5^1\times {\mathrm{270667}}^1$

素因数の和:270680

約数の個数: 20

約数和(自身を含む): 50344248

約数和(自身を除く): 28690888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270667, 541334, 1082668, 1353335, 2165336, 2706670, 4330672, 5413340, 10826680, 21653360]

約数ペア:

[(1, 21653360), (2, 10826680), (4, 5413340), (5, 4330672), (8, 2706670), (10, 2165336), (16, 1353335), (20, 1082668), (40, 541334), (80, 270667)]