19816685

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 8937235

約数列:

[1, 5, 7, 23, 35, 103, 115, 161, 239, 515, 721, 805, 1195, 1673, 2369, 3605, 5497, 8365, 11845, 16583, 24617, 27485, 38479, 82915, 123085, 172319, 192395, 566191, 861595, 2830955, 3963337, 19816685]

約数ペア:

[(1, 19816685), (5, 3963337), (7, 2830955), (23, 861595), (35, 566191), (103, 192395), (115, 172319), (161, 123085), (239, 82915), (515, 38479), (721, 27485), (805, 24617), (1195, 16583), (1673, 11845), (2369, 8365), (3605, 5497)]