19991216

素因数分解:

$2^4\times 7^2\times {\mathrm{43}}^1\times {\mathrm{593}}^1$

素因数の和:658

約数の個数: 60

約数和(自身を含む): 46182312

約数和(自身を除く): 26191096

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 43, 49, 56, 86, 98, 112, 172, 196, 301, 344, 392, 593, 602, 688, 784, 1186, 1204, 2107, 2372, 2408, 4151, 4214, 4744, 4816, 8302, 8428, 9488, 16604, 16856, 25499, 29057, 33208, 33712, 50998, 58114, 66416, 101996, 116228, 178493, 203992, 232456, 356986, 407984, 464912, 713972, 1249451, 1427944, 2498902, 2855888, 4997804, 9995608, 19991216]

約数ペア:

[(1, 19991216), (2, 9995608), (4, 4997804), (7, 2855888), (8, 2498902), (14, 1427944), (16, 1249451), (28, 713972), (43, 464912), (49, 407984), (56, 356986), (86, 232456), (98, 203992), (112, 178493), (172, 116228), (196, 101996), (301, 66416), (344, 58114), (392, 50998), (593, 33712), (602, 33208), (688, 29057), (784, 25499), (1186, 16856), (1204, 16604), (2107, 9488), (2372, 8428), (2408, 8302), (4151, 4816), (4214, 4744)]