20438165

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21859}}^1$

素因数の和:21892

約数の個数: 16

約数和(自身を含む): 28330560

約数和(自身を除く): 7892395

約数列:

[1, 5, 11, 17, 55, 85, 187, 935, 21859, 109295, 240449, 371603, 1202245, 1858015, 4087633, 20438165]

約数ペア:

[(1, 20438165), (5, 4087633), (11, 1858015), (17, 1202245), (55, 371603), (85, 240449), (187, 109295), (935, 21859)]