21477555

素因数分解:

$3^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1607}}^1$

素因数の和:1638

約数の個数: 48

約数和(自身を含む): 42142464

約数和(自身を除く): 20664909

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 243, 297, 405, 495, 891, 1215, 1485, 1607, 2673, 4455, 4821, 8035, 13365, 14463, 17677, 24105, 43389, 53031, 72315, 88385, 130167, 159093, 216945, 265155, 390501, 477279, 650835, 795465, 1431837, 1952505, 2386395, 4295511, 7159185, 21477555]

約数ペア:

[(1, 21477555), (3, 7159185), (5, 4295511), (9, 2386395), (11, 1952505), (15, 1431837), (27, 795465), (33, 650835), (45, 477279), (55, 390501), (81, 265155), (99, 216945), (135, 159093), (165, 130167), (243, 88385), (297, 72315), (405, 53031), (495, 43389), (891, 24105), (1215, 17677), (1485, 14463), (1607, 13365), (2673, 8035), (4455, 4821)]