19999872

素因数分解:

$2^7\times 3^5\times {\mathrm{643}}^1$

素因数の和:672

約数の個数: 96

約数和(自身を含む): 59776080

約数和(自身を除く): 39776208

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 64, 72, 81, 96, 108, 128, 144, 162, 192, 216, 243, 288, 324, 384, 432, 486, 576, 643, 648, 864, 972, 1152, 1286, 1296, 1728, 1929, 1944, 2572, 2592, 3456, 3858, 3888, 5144, 5184, 5787, 7716, 7776, 10288, 10368, 11574, 15432, 15552, 17361, 20576, 23148, 30864, 31104, 34722, 41152, 46296, 52083, 61728, 69444, 82304, 92592, 104166, 123456, 138888, 156249, 185184, 208332, 246912, 277776, 312498, 370368, 416664, 555552, 624996, 740736, 833328, 1111104, 1249992, 1666656, 2222208, 2499984, 3333312, 4999968, 6666624, 9999936, 19999872]

約数ペア:

[(1, 19999872), (2, 9999936), (3, 6666624), (4, 4999968), (6, 3333312), (8, 2499984), (9, 2222208), (12, 1666656), (16, 1249992), (18, 1111104), (24, 833328), (27, 740736), (32, 624996), (36, 555552), (48, 416664), (54, 370368), (64, 312498), (72, 277776), (81, 246912), (96, 208332), (108, 185184), (128, 156249), (144, 138888), (162, 123456), (192, 104166), (216, 92592), (243, 82304), (288, 69444), (324, 61728), (384, 52083), (432, 46296), (486, 41152), (576, 34722), (643, 31104), (648, 30864), (864, 23148), (972, 20576), (1152, 17361), (1286, 15552), (1296, 15432), (1728, 11574), (1929, 10368), (1944, 10288), (2572, 7776), (2592, 7716), (3456, 5787), (3858, 5184), (3888, 5144)]