21681680

素因数分解:

$2^4\times 5^1\times {\mathrm{271021}}^1$

素因数の和:271034

約数の個数: 20

約数和(自身を含む): 50410092

約数和(自身を除く): 28728412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271021, 542042, 1084084, 1355105, 2168168, 2710210, 4336336, 5420420, 10840840, 21681680]

約数ペア:

[(1, 21681680), (2, 10840840), (4, 5420420), (5, 4336336), (8, 2710210), (10, 2168168), (16, 1355105), (20, 1084084), (40, 542042), (80, 271021)]