21070221

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{1181}}^1$

素因数の和:1516

約数の個数: 16

約数和(自身を含む): 29691840

約数和(自身を除く): 8621619

約数列:

[1, 3, 19, 57, 313, 939, 1181, 3543, 5947, 17841, 22439, 67317, 369653, 1108959, 7023407, 21070221]

約数ペア:

[(1, 21070221), (3, 7023407), (19, 1108959), (57, 369653), (313, 67317), (939, 22439), (1181, 17841), (3543, 5947)]