28039375

素因数分解:

$5^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1$

素因数の和:86

約数の個数: 80

約数和(自身を含む): 47234880

約数和(自身を除く): 19195505

約数列:

[1, 5, 7, 13, 17, 25, 29, 35, 65, 85, 91, 119, 125, 145, 175, 203, 221, 325, 377, 425, 455, 493, 595, 625, 725, 875, 1015, 1105, 1547, 1625, 1885, 2125, 2275, 2465, 2639, 2975, 3451, 3625, 4375, 5075, 5525, 6409, 7735, 8125, 9425, 10625, 11375, 12325, 13195, 14875, 17255, 18125, 25375, 27625, 32045, 38675, 44863, 47125, 56875, 61625, 65975, 74375, 86275, 126875, 138125, 160225, 193375, 224315, 235625, 308125, 329875, 431375, 801125, 966875, 1121575, 1649375, 2156875, 4005625, 5607875, 28039375]

約数ペア:

[(1, 28039375), (5, 5607875), (7, 4005625), (13, 2156875), (17, 1649375), (25, 1121575), (29, 966875), (35, 801125), (65, 431375), (85, 329875), (91, 308125), (119, 235625), (125, 224315), (145, 193375), (175, 160225), (203, 138125), (221, 126875), (325, 86275), (377, 74375), (425, 65975), (455, 61625), (493, 56875), (595, 47125), (625, 44863), (725, 38675), (875, 32045), (1015, 27625), (1105, 25375), (1547, 18125), (1625, 17255), (1885, 14875), (2125, 13195), (2275, 12325), (2465, 11375), (2639, 10625), (2975, 9425), (3451, 8125), (3625, 7735), (4375, 6409), (5075, 5525)]