19117904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{859}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 40309920

約数和(自身を除く): 21192016

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 107, 208, 214, 428, 856, 859, 1391, 1712, 1718, 2782, 3436, 5564, 6872, 11128, 11167, 13744, 22256, 22334, 44668, 89336, 91913, 178672, 183826, 367652, 735304, 1194869, 1470608, 2389738, 4779476, 9558952, 19117904]

約数ペア:

[(1, 19117904), (2, 9558952), (4, 4779476), (8, 2389738), (13, 1470608), (16, 1194869), (26, 735304), (52, 367652), (104, 183826), (107, 178672), (208, 91913), (214, 89336), (428, 44668), (856, 22334), (859, 22256), (1391, 13744), (1712, 11167), (1718, 11128), (2782, 6872), (3436, 5564)]