21202389

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{7879}}^1$

素因数の和:7921

約数の個数: 24

約数和(自身を含む): 34419840

約数和(自身を除く): 13217451

約数列:

[1, 3, 9, 13, 23, 39, 69, 117, 207, 299, 897, 2691, 7879, 23637, 70911, 102427, 181217, 307281, 543651, 921843, 1630953, 2355821, 7067463, 21202389]

約数ペア:

[(1, 21202389), (3, 7067463), (9, 2355821), (13, 1630953), (23, 921843), (39, 543651), (69, 307281), (117, 181217), (207, 102427), (299, 70911), (897, 23637), (2691, 7879)]