21861520

素因数分解:

$2^4\times 5^1\times {\mathrm{273269}}^1$

素因数の和:273282

約数の個数: 20

約数和(自身を含む): 50828220

約数和(自身を除く): 28966700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273269, 546538, 1093076, 1366345, 2186152, 2732690, 4372304, 5465380, 10930760, 21861520]

約数ペア:

[(1, 21861520), (2, 10930760), (4, 5465380), (5, 4372304), (8, 2732690), (10, 2186152), (16, 1366345), (20, 1093076), (40, 546538), (80, 273269)]