21137375

素因数分解:

$5^3\times 7^3\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:82

約数の個数: 64

約数和(自身を含む): 33696000

約数和(自身を除く): 12558625

約数列:

[1, 5, 7, 17, 25, 29, 35, 49, 85, 119, 125, 145, 175, 203, 245, 343, 425, 493, 595, 725, 833, 875, 1015, 1225, 1421, 1715, 2125, 2465, 2975, 3451, 3625, 4165, 5075, 5831, 6125, 7105, 8575, 9947, 12325, 14875, 17255, 20825, 24157, 25375, 29155, 35525, 42875, 49735, 61625, 86275, 104125, 120785, 145775, 169099, 177625, 248675, 431375, 603925, 728875, 845495, 1243375, 3019625, 4227475, 21137375]

約数ペア:

[(1, 21137375), (5, 4227475), (7, 3019625), (17, 1243375), (25, 845495), (29, 728875), (35, 603925), (49, 431375), (85, 248675), (119, 177625), (125, 169099), (145, 145775), (175, 120785), (203, 104125), (245, 86275), (343, 61625), (425, 49735), (493, 42875), (595, 35525), (725, 29155), (833, 25375), (875, 24157), (1015, 20825), (1225, 17255), (1421, 14875), (1715, 12325), (2125, 9947), (2465, 8575), (2975, 7105), (3451, 6125), (3625, 5831), (4165, 5075)]