18191965

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 25318656

約数和(自身を除く): 7126691

約数列:

[1, 5, 11, 23, 55, 73, 115, 197, 253, 365, 803, 985, 1265, 1679, 2167, 4015, 4531, 8395, 10835, 14381, 18469, 22655, 49841, 71905, 92345, 158191, 249205, 330763, 790955, 1653815, 3638393, 18191965]

約数ペア:

[(1, 18191965), (5, 3638393), (11, 1653815), (23, 790955), (55, 330763), (73, 249205), (115, 158191), (197, 92345), (253, 71905), (365, 49841), (803, 22655), (985, 18469), (1265, 14381), (1679, 10835), (2167, 8395), (4015, 4531)]