21294890

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{49523}}^1$

素因数の和:49573

約数の個数: 16

約数和(自身を含む): 39223008

約数和(自身を除く): 17928118

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 49523, 99046, 247615, 495230, 2129489, 4258978, 10647445, 21294890]

約数ペア:

[(1, 21294890), (2, 10647445), (5, 4258978), (10, 2129489), (43, 495230), (86, 247615), (215, 99046), (430, 49523)]