19865175

素因数分解:

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

素因数の和:245

約数の個数: 48

約数和(自身を含む): 36307200

約数和(自身を除く): 16442025

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 121, 165, 199, 275, 363, 597, 605, 825, 995, 1331, 1815, 2189, 2985, 3025, 3993, 4975, 6567, 6655, 9075, 10945, 14925, 19965, 24079, 32835, 33275, 54725, 72237, 99825, 120395, 164175, 264869, 361185, 601975, 794607, 1324345, 1805925, 3973035, 6621725, 19865175]

約数ペア:

[(1, 19865175), (3, 6621725), (5, 3973035), (11, 1805925), (15, 1324345), (25, 794607), (33, 601975), (55, 361185), (75, 264869), (121, 164175), (165, 120395), (199, 99825), (275, 72237), (363, 54725), (597, 33275), (605, 32835), (825, 24079), (995, 19965), (1331, 14925), (1815, 10945), (2189, 9075), (2985, 6655), (3025, 6567), (3993, 4975)]