21457175

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{227}}^1$

素因数の和:455

約数の個数: 24

約数和(自身を含む): 28272000

約数和(自身を除く): 6814825

約数列:

[1, 5, 19, 25, 95, 199, 227, 475, 995, 1135, 3781, 4313, 4975, 5675, 18905, 21565, 45173, 94525, 107825, 225865, 858287, 1129325, 4291435, 21457175]

約数ペア:

[(1, 21457175), (5, 4291435), (19, 1129325), (25, 858287), (95, 225865), (199, 107825), (227, 94525), (475, 45173), (995, 21565), (1135, 18905), (3781, 5675), (4313, 4975)]