21643125

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1$

素因数の和:144

約数の個数: 80

約数和(自身を含む): 44085888

約数和(自身を除く): 22442763

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 97, 105, 119, 125, 175, 255, 291, 357, 375, 425, 485, 525, 595, 625, 679, 875, 1275, 1455, 1649, 1785, 1875, 2037, 2125, 2425, 2625, 2975, 3395, 4375, 4947, 6375, 7275, 8245, 8925, 10185, 10625, 11543, 12125, 13125, 14875, 16975, 24735, 31875, 34629, 36375, 41225, 44625, 50925, 57715, 60625, 74375, 84875, 123675, 173145, 181875, 206125, 223125, 254625, 288575, 424375, 618375, 865725, 1030625, 1273125, 1442875, 3091875, 4328625, 7214375, 21643125]

約数ペア:

[(1, 21643125), (3, 7214375), (5, 4328625), (7, 3091875), (15, 1442875), (17, 1273125), (21, 1030625), (25, 865725), (35, 618375), (51, 424375), (75, 288575), (85, 254625), (97, 223125), (105, 206125), (119, 181875), (125, 173145), (175, 123675), (255, 84875), (291, 74375), (357, 60625), (375, 57715), (425, 50925), (485, 44625), (525, 41225), (595, 36375), (625, 34629), (679, 31875), (875, 24735), (1275, 16975), (1455, 14875), (1649, 13125), (1785, 12125), (1875, 11543), (2037, 10625), (2125, 10185), (2425, 8925), (2625, 8245), (2975, 7275), (3395, 6375), (4375, 4947)]