256757375

素因数分解:

$5^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:501

約数の個数: 64

約数和(自身を含む): 398151936

約数和(自身を除く): 141394561

約数列:

[1, 5, 7, 17, 25, 35, 41, 85, 119, 125, 175, 205, 287, 421, 425, 595, 697, 875, 1025, 1435, 2105, 2125, 2947, 2975, 3485, 4879, 5125, 7157, 7175, 10525, 14735, 14875, 17261, 17425, 24395, 35785, 35875, 50099, 52625, 73675, 86305, 87125, 120827, 121975, 178925, 250495, 293437, 368375, 431525, 604135, 609875, 894625, 1252475, 1467185, 2054059, 2157625, 3020675, 6262375, 7335925, 10270295, 15103375, 36679625, 51351475, 256757375]

約数ペア:

[(1, 256757375), (5, 51351475), (7, 36679625), (17, 15103375), (25, 10270295), (35, 7335925), (41, 6262375), (85, 3020675), (119, 2157625), (125, 2054059), (175, 1467185), (205, 1252475), (287, 894625), (421, 609875), (425, 604135), (595, 431525), (697, 368375), (875, 293437), (1025, 250495), (1435, 178925), (2105, 121975), (2125, 120827), (2947, 87125), (2975, 86305), (3485, 73675), (4879, 52625), (5125, 50099), (7157, 35875), (7175, 35785), (10525, 24395), (14735, 17425), (14875, 17261)]