19890778

素因数分解:

$2^1\times {\mathrm{31}}^2\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:274

約数の個数: 24

約数和(自身を含む): 31458240

約数和(自身を除く): 11567462

約数列:

[1, 2, 31, 62, 79, 131, 158, 262, 961, 1922, 2449, 4061, 4898, 8122, 10349, 20698, 75919, 125891, 151838, 251782, 320819, 641638, 9945389, 19890778]

約数ペア:

[(1, 19890778), (2, 9945389), (31, 641638), (62, 320819), (79, 251782), (131, 151838), (158, 125891), (262, 75919), (961, 20698), (1922, 10349), (2449, 8122), (4061, 4898)]