20988165

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{971}}^1$

素因数の和:1121

約数の個数: 32

約数和(自身を含む): 36951552

約数和(自身を除く): 15963387

約数列:

[1, 3, 5, 11, 15, 33, 55, 131, 165, 393, 655, 971, 1441, 1965, 2913, 4323, 4855, 7205, 10681, 14565, 21615, 32043, 53405, 127201, 160215, 381603, 636005, 1399211, 1908015, 4197633, 6996055, 20988165]

約数ペア:

[(1, 20988165), (3, 6996055), (5, 4197633), (11, 1908015), (15, 1399211), (33, 636005), (55, 381603), (131, 160215), (165, 127201), (393, 53405), (655, 32043), (971, 21615), (1441, 14565), (1965, 10681), (2913, 7205), (4323, 4855)]