18781581

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{773}}^1$

素因数の和:885

約数の個数: 32

約数和(自身を含む): 31207680

約数和(自身を除く): 12426099

約数列:

[1, 3, 7, 13, 21, 39, 89, 91, 267, 273, 623, 773, 1157, 1869, 2319, 3471, 5411, 8099, 10049, 16233, 24297, 30147, 68797, 70343, 206391, 211029, 481579, 894361, 1444737, 2683083, 6260527, 18781581]

約数ペア:

[(1, 18781581), (3, 6260527), (7, 2683083), (13, 1444737), (21, 894361), (39, 481579), (89, 211029), (91, 206391), (267, 70343), (273, 68797), (623, 30147), (773, 24297), (1157, 16233), (1869, 10049), (2319, 8099), (3471, 5411)]