19901703

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{229}}^1\times {\mathrm{491}}^1$

素因数の和:782

約数の個数: 16

約数和(自身を含む): 27158400

約数和(自身を除く): 7256697

約数列:

[1, 3, 59, 177, 229, 491, 687, 1473, 13511, 28969, 40533, 86907, 112439, 337317, 6633901, 19901703]

約数ペア:

[(1, 19901703), (3, 6633901), (59, 337317), (177, 112439), (229, 86907), (491, 40533), (687, 28969), (1473, 13511)]