21930921

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{463}}^1$

素因数の和:765

約数の個数: 24

約数和(自身を含む): 33537920

約数和(自身を除く): 11606999

約数列:

[1, 3, 9, 19, 57, 171, 277, 463, 831, 1389, 2493, 4167, 5263, 8797, 15789, 26391, 47367, 79173, 128251, 384753, 1154259, 2436769, 7310307, 21930921]

約数ペア:

[(1, 21930921), (3, 7310307), (9, 2436769), (19, 1154259), (57, 384753), (171, 128251), (277, 79173), (463, 47367), (831, 26391), (1389, 15789), (2493, 8797), (4167, 5263)]