18861245

素因数分解:

$5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{101}}^1$

素因数の和:162

約数の個数: 32

約数和(自身を含む): 26218080

約数和(自身を除く): 7356835

約数列:

[1, 5, 13, 17, 65, 85, 101, 169, 221, 505, 845, 1105, 1313, 1717, 2197, 2873, 6565, 8585, 10985, 14365, 17069, 22321, 37349, 85345, 111605, 186745, 221897, 290173, 1109485, 1450865, 3772249, 18861245]

約数ペア:

[(1, 18861245), (5, 3772249), (13, 1450865), (17, 1109485), (65, 290173), (85, 221897), (101, 186745), (169, 111605), (221, 85345), (505, 37349), (845, 22321), (1105, 17069), (1313, 14365), (1717, 10985), (2197, 8585), (2873, 6565)]