19938021

素因数分解:

$3^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1\times {\mathrm{349}}^1$

素因数の和:628

約数の個数: 16

約数和(自身を含む): 27048000

約数和(自身を除く): 7109979

約数列:

[1, 3, 137, 139, 349, 411, 417, 1047, 19043, 47813, 48511, 57129, 143439, 145533, 6646007, 19938021]

約数ペア:

[(1, 19938021), (3, 6646007), (137, 145533), (139, 143439), (349, 57129), (411, 48511), (417, 47813), (1047, 19043)]