18907587

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 12542013

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 199, 207, 243, 391, 459, 597, 621, 1173, 1377, 1791, 1863, 3383, 3519, 4131, 4577, 5373, 5589, 10149, 10557, 13731, 16119, 30447, 31671, 41193, 48357, 77809, 91341, 95013, 123579, 233427, 274023, 370737, 700281, 822069, 1112211, 2100843, 6302529, 18907587]

約数ペア:

[(1, 18907587), (3, 6302529), (9, 2100843), (17, 1112211), (23, 822069), (27, 700281), (51, 370737), (69, 274023), (81, 233427), (153, 123579), (199, 95013), (207, 91341), (243, 77809), (391, 48357), (459, 41193), (597, 31671), (621, 30447), (1173, 16119), (1377, 13731), (1791, 10557), (1863, 10149), (3383, 5589), (3519, 5373), (4131, 4577)]