20988585

素因数分解:

$3^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1453}}^1$

素因数の和:1574

約数の個数: 32

約数和(自身を含む): 37687680

約数和(自身を除く): 16699095

約数列:

[1, 3, 5, 9, 15, 27, 45, 107, 135, 321, 535, 963, 1453, 1605, 2889, 4359, 4815, 7265, 13077, 14445, 21795, 39231, 65385, 155471, 196155, 466413, 777355, 1399239, 2332065, 4197717, 6996195, 20988585]

約数ペア:

[(1, 20988585), (3, 6996195), (5, 4197717), (9, 2332065), (15, 1399239), (27, 777355), (45, 466413), (107, 196155), (135, 155471), (321, 65385), (535, 39231), (963, 21795), (1453, 14445), (1605, 13077), (2889, 7265), (4359, 4815)]