19804994

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{6571}}^1$

素因数の和:6721

約数の個数: 16

約数和(自身を含む): 32649696

約数和(自身を除く): 12844702

約数列:

[1, 2, 11, 22, 137, 274, 1507, 3014, 6571, 13142, 72281, 144562, 900227, 1800454, 9902497, 19804994]

約数ペア:

[(1, 19804994), (2, 9902497), (11, 1800454), (22, 900227), (137, 144562), (274, 72281), (1507, 13142), (3014, 6571)]