20457549

素因数分解:

$3^3\times 7^3\times {\mathrm{47}}^2$

素因数の和:124

約数の個数: 48

約数和(自身を含む): 36112000

約数和(自身を除く): 15654451

約数列:

[1, 3, 7, 9, 21, 27, 47, 49, 63, 141, 147, 189, 329, 343, 423, 441, 987, 1029, 1269, 1323, 2209, 2303, 2961, 3087, 6627, 6909, 8883, 9261, 15463, 16121, 19881, 20727, 46389, 48363, 59643, 62181, 108241, 139167, 145089, 324723, 417501, 435267, 757687, 974169, 2273061, 2922507, 6819183, 20457549]

約数ペア:

[(1, 20457549), (3, 6819183), (7, 2922507), (9, 2273061), (21, 974169), (27, 757687), (47, 435267), (49, 417501), (63, 324723), (141, 145089), (147, 139167), (189, 108241), (329, 62181), (343, 59643), (423, 48363), (441, 46389), (987, 20727), (1029, 19881), (1269, 16121), (1323, 15463), (2209, 9261), (2303, 8883), (2961, 6909), (3087, 6627)]