20355517

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{193}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 26942720

約数和(自身を除く): 6587203

約数列:

[1, 7, 13, 19, 61, 91, 133, 193, 247, 427, 793, 1159, 1351, 1729, 2509, 3667, 5551, 8113, 11773, 15067, 17563, 25669, 47671, 82411, 105469, 153049, 223687, 333697, 1071343, 1565809, 2907931, 20355517]

約数ペア:

[(1, 20355517), (7, 2907931), (13, 1565809), (19, 1071343), (61, 333697), (91, 223687), (133, 153049), (193, 105469), (247, 82411), (427, 47671), (793, 25669), (1159, 17563), (1351, 15067), (1729, 11773), (2509, 8113), (3667, 5551)]