257128130

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{179}}^1\times {\mathrm{20521}}^1$

素因数の和:20714

約数の個数: 32

約数和(自身を含む): 531930240

約数和(自身を除く): 274802110

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 179, 358, 895, 1253, 1790, 2506, 6265, 12530, 20521, 41042, 102605, 143647, 205210, 287294, 718235, 1436470, 3673259, 7346518, 18366295, 25712813, 36732590, 51425626, 128564065, 257128130]

約数ペア:

[(1, 257128130), (2, 128564065), (5, 51425626), (7, 36732590), (10, 25712813), (14, 18366295), (35, 7346518), (70, 3673259), (179, 1436470), (358, 718235), (895, 287294), (1253, 205210), (1790, 143647), (2506, 102605), (6265, 41042), (12530, 20521)]