21813910

素因数分解:

$2^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{4969}}^1$

素因数の和:5415

約数の個数: 16

約数和(自身を含む): 39362400

約数和(自身を除く): 17548490

約数列:

[1, 2, 5, 10, 439, 878, 2195, 4390, 4969, 9938, 24845, 49690, 2181391, 4362782, 10906955, 21813910]

約数ペア:

[(1, 21813910), (2, 10906955), (5, 4362782), (10, 2181391), (439, 49690), (878, 24845), (2195, 9938), (4390, 4969)]