21391960

素因数分解:

$2^3\times 5^1\times {\mathrm{534799}}^1$

素因数の和:534810

約数の個数: 16

約数和(自身を含む): 48132000

約数和(自身を除く): 26740040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 534799, 1069598, 2139196, 2673995, 4278392, 5347990, 10695980, 21391960]

約数ペア:

[(1, 21391960), (2, 10695980), (4, 5347990), (5, 4278392), (8, 2673995), (10, 2139196), (20, 1069598), (40, 534799)]