18905948

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{257}}^1\times {\mathrm{347}}^1$

素因数の和:661

約数の個数: 24

約数和(自身を含む): 33938352

約数和(自身を除く): 15032404

約数列:

[1, 2, 4, 53, 106, 212, 257, 347, 514, 694, 1028, 1388, 13621, 18391, 27242, 36782, 54484, 73564, 89179, 178358, 356716, 4726487, 9452974, 18905948]

約数ペア:

[(1, 18905948), (2, 9452974), (4, 4726487), (53, 356716), (106, 178358), (212, 89179), (257, 73564), (347, 54484), (514, 36782), (694, 27242), (1028, 18391), (1388, 13621)]