19858125

素因数分解:

$3^1\times 5^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1$

素因数の和:136

約数の個数: 80

約数和(自身を含む): 40487040

約数和(自身を除く): 20628915

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 89, 105, 119, 125, 175, 255, 267, 357, 375, 425, 445, 525, 595, 623, 625, 875, 1275, 1335, 1513, 1785, 1869, 1875, 2125, 2225, 2625, 2975, 3115, 4375, 4539, 6375, 6675, 7565, 8925, 9345, 10591, 10625, 11125, 13125, 14875, 15575, 22695, 31773, 31875, 33375, 37825, 44625, 46725, 52955, 55625, 74375, 77875, 113475, 158865, 166875, 189125, 223125, 233625, 264775, 389375, 567375, 794325, 945625, 1168125, 1323875, 2836875, 3971625, 6619375, 19858125]

約数ペア:

[(1, 19858125), (3, 6619375), (5, 3971625), (7, 2836875), (15, 1323875), (17, 1168125), (21, 945625), (25, 794325), (35, 567375), (51, 389375), (75, 264775), (85, 233625), (89, 223125), (105, 189125), (119, 166875), (125, 158865), (175, 113475), (255, 77875), (267, 74375), (357, 55625), (375, 52955), (425, 46725), (445, 44625), (525, 37825), (595, 33375), (623, 31875), (625, 31773), (875, 22695), (1275, 15575), (1335, 14875), (1513, 13125), (1785, 11125), (1869, 10625), (1875, 10591), (2125, 9345), (2225, 8925), (2625, 7565), (2975, 6675), (3115, 6375), (4375, 4539)]