20587545

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 41496000

約数和(自身を除く): 20908455

約数列:

[1, 3, 5, 9, 11, 15, 19, 33, 45, 55, 57, 95, 99, 121, 165, 171, 199, 209, 285, 363, 495, 597, 605, 627, 855, 995, 1045, 1089, 1791, 1815, 1881, 2189, 2299, 2985, 3135, 3781, 5445, 6567, 6897, 8955, 9405, 10945, 11343, 11495, 18905, 19701, 20691, 24079, 32835, 34029, 34485, 41591, 56715, 72237, 98505, 103455, 120395, 124773, 170145, 207955, 216711, 361185, 374319, 457501, 623865, 1083555, 1372503, 1871595, 2287505, 4117509, 6862515, 20587545]

約数ペア:

[(1, 20587545), (3, 6862515), (5, 4117509), (9, 2287505), (11, 1871595), (15, 1372503), (19, 1083555), (33, 623865), (45, 457501), (55, 374319), (57, 361185), (95, 216711), (99, 207955), (121, 170145), (165, 124773), (171, 120395), (199, 103455), (209, 98505), (285, 72237), (363, 56715), (495, 41591), (597, 34485), (605, 34029), (627, 32835), (855, 24079), (995, 20691), (1045, 19701), (1089, 18905), (1791, 11495), (1815, 11343), (1881, 10945), (2189, 9405), (2299, 8955), (2985, 6897), (3135, 6567), (3781, 5445)]