18909289

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1\times {\mathrm{457}}^1$

素因数の和:744

約数の個数: 16

約数和(自身を含む): 22687488

約数和(自身を除く): 3778199

約数列:

[1, 7, 23, 161, 257, 457, 1799, 3199, 5911, 10511, 41377, 73577, 117449, 822143, 2701327, 18909289]

約数ペア:

[(1, 18909289), (7, 2701327), (23, 822143), (161, 117449), (257, 73577), (457, 41377), (1799, 10511), (3199, 5911)]