28517815

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:223

約数の個数: 32

約数和(自身を含む): 37509120

約数和(自身を除く): 8991305

約数列:

[1, 5, 23, 43, 73, 79, 115, 215, 365, 395, 989, 1679, 1817, 3139, 3397, 4945, 5767, 8395, 9085, 15695, 16985, 28835, 72197, 78131, 132641, 247981, 360985, 390655, 663205, 1239905, 5703563, 28517815]

約数ペア:

[(1, 28517815), (5, 5703563), (23, 1239905), (43, 663205), (73, 390655), (79, 360985), (115, 247981), (215, 132641), (365, 78131), (395, 72197), (989, 28835), (1679, 16985), (1817, 15695), (3139, 9085), (3397, 8395), (4945, 5767)]