20687487

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{107}}^1\times {\mathrm{223}}^1$

素因数の和:367

約数の個数: 24

約数和(自身を含む): 29707776

約数和(自身を除く): 9020289

約数列:

[1, 3, 17, 51, 107, 223, 289, 321, 669, 867, 1819, 3791, 5457, 11373, 23861, 30923, 64447, 71583, 92769, 193341, 405637, 1216911, 6895829, 20687487]

約数ペア:

[(1, 20687487), (3, 6895829), (17, 1216911), (51, 405637), (107, 193341), (223, 92769), (289, 71583), (321, 64447), (669, 30923), (867, 23861), (1819, 11373), (3791, 5457)]