257779520

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{6343}}^1$

素因数の和:6487

約数の個数: 56

約数和(自身を含む): 618768384

約数和(自身を除く): 360988864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 508, 635, 1016, 1270, 2032, 2540, 4064, 5080, 6343, 8128, 10160, 12686, 20320, 25372, 31715, 40640, 50744, 63430, 101488, 126860, 202976, 253720, 405952, 507440, 805561, 1014880, 1611122, 2029760, 3222244, 4027805, 6444488, 8055610, 12888976, 16111220, 25777952, 32222440, 51555904, 64444880, 128889760, 257779520]

約数ペア:

[(1, 257779520), (2, 128889760), (4, 64444880), (5, 51555904), (8, 32222440), (10, 25777952), (16, 16111220), (20, 12888976), (32, 8055610), (40, 6444488), (64, 4027805), (80, 3222244), (127, 2029760), (160, 1611122), (254, 1014880), (320, 805561), (508, 507440), (635, 405952), (1016, 253720), (1270, 202976), (2032, 126860), (2540, 101488), (4064, 63430), (5080, 50744), (6343, 40640), (8128, 31715), (10160, 25372), (12686, 20320)]