18717985

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{557}}^1$

素因数の和:633

約数の個数: 32

約数和(自身を含む): 26998272

約数和(自身を除く): 8280287

約数列:

[1, 5, 11, 13, 47, 55, 65, 143, 235, 517, 557, 611, 715, 2585, 2785, 3055, 6127, 6721, 7241, 26179, 30635, 33605, 36205, 79651, 130895, 287969, 340327, 398255, 1439845, 1701635, 3743597, 18717985]

約数ペア:

[(1, 18717985), (5, 3743597), (11, 1701635), (13, 1439845), (47, 398255), (55, 340327), (65, 287969), (143, 130895), (235, 79651), (517, 36205), (557, 33605), (611, 30635), (715, 26179), (2585, 7241), (2785, 6721), (3055, 6127)]