19978672

素因数分解:

$2^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1499}}^1$

素因数の和:1538

約数の個数: 60

約数和(自身を含む): 47709000

約数和(自身を除く): 27730328

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 49, 56, 68, 98, 112, 119, 136, 196, 238, 272, 392, 476, 784, 833, 952, 1499, 1666, 1904, 2998, 3332, 5996, 6664, 10493, 11992, 13328, 20986, 23984, 25483, 41972, 50966, 73451, 83944, 101932, 146902, 167888, 178381, 203864, 293804, 356762, 407728, 587608, 713524, 1175216, 1248667, 1427048, 2497334, 2854096, 4994668, 9989336, 19978672]

約数ペア:

[(1, 19978672), (2, 9989336), (4, 4994668), (7, 2854096), (8, 2497334), (14, 1427048), (16, 1248667), (17, 1175216), (28, 713524), (34, 587608), (49, 407728), (56, 356762), (68, 293804), (98, 203864), (112, 178381), (119, 167888), (136, 146902), (196, 101932), (238, 83944), (272, 73451), (392, 50966), (476, 41972), (784, 25483), (833, 23984), (952, 20986), (1499, 13328), (1666, 11992), (1904, 10493), (2998, 6664), (3332, 5996)]