28520960

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{857}}^1$

素因数の和:893

約数の個数: 80

約数和(自身を含む): 73729656

約数和(自身を除く): 45208696

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 832, 857, 1040, 1280, 1664, 1714, 2080, 2560, 3328, 3428, 4160, 4285, 6656, 6856, 8320, 8570, 11141, 13712, 16640, 17140, 22282, 27424, 33280, 34280, 44564, 54848, 55705, 68560, 89128, 109696, 111410, 137120, 178256, 219392, 222820, 274240, 356512, 438784, 445640, 548480, 713024, 891280, 1096960, 1426048, 1782560, 2193920, 2852096, 3565120, 5704192, 7130240, 14260480, 28520960]

約数ペア:

[(1, 28520960), (2, 14260480), (4, 7130240), (5, 5704192), (8, 3565120), (10, 2852096), (13, 2193920), (16, 1782560), (20, 1426048), (26, 1096960), (32, 891280), (40, 713024), (52, 548480), (64, 445640), (65, 438784), (80, 356512), (104, 274240), (128, 222820), (130, 219392), (160, 178256), (208, 137120), (256, 111410), (260, 109696), (320, 89128), (416, 68560), (512, 55705), (520, 54848), (640, 44564), (832, 34280), (857, 33280), (1040, 27424), (1280, 22282), (1664, 17140), (1714, 16640), (2080, 13712), (2560, 11141), (3328, 8570), (3428, 8320), (4160, 6856), (4285, 6656)]