21759921

素因数分解:

$3^6\times {\mathrm{19}}^1\times {\mathrm{1571}}^1$

素因数の和:1608

約数の個数: 28

約数和(自身を含む): 34363920

約数和(自身を除く): 12603999

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 513, 729, 1539, 1571, 4617, 4713, 13851, 14139, 29849, 42417, 89547, 127251, 268641, 381753, 805923, 1145259, 2417769, 7253307, 21759921]

約数ペア:

[(1, 21759921), (3, 7253307), (9, 2417769), (19, 1145259), (27, 805923), (57, 381753), (81, 268641), (171, 127251), (243, 89547), (513, 42417), (729, 29849), (1539, 14139), (1571, 13851), (4617, 4713)]