21257565

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11909}}^1$

素因数の和:11941

約数の個数: 32

約数和(自身を含む): 41160960

約数和(自身を除く): 19903395

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11909, 35727, 59545, 83363, 178635, 202453, 250089, 416815, 607359, 1012265, 1250445, 1417171, 3036795, 4251513, 7085855, 21257565]

約数ペア:

[(1, 21257565), (3, 7085855), (5, 4251513), (7, 3036795), (15, 1417171), (17, 1250445), (21, 1012265), (35, 607359), (51, 416815), (85, 250089), (105, 202453), (119, 178635), (255, 83363), (357, 59545), (595, 35727), (1785, 11909)]