218991994

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{495457}}^1$

素因数の和:495489

約数の個数: 16

約数和(自身を含む): 374566248

約数和(自身を除く): 155574254

約数列:

[1, 2, 13, 17, 26, 34, 221, 442, 495457, 990914, 6440941, 8422769, 12881882, 16845538, 109495997, 218991994]

約数ペア:

[(1, 218991994), (2, 109495997), (13, 16845538), (17, 12881882), (26, 8422769), (34, 6440941), (221, 990914), (442, 495457)]