19906881

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{5347}}^1$

素因数の和:5440

約数の個数: 16

約数和(自身を含む): 28494144

約数和(自身を除く): 8587263

約数列:

[1, 3, 17, 51, 73, 219, 1241, 3723, 5347, 16041, 90899, 272697, 390331, 1170993, 6635627, 19906881]

約数ペア:

[(1, 19906881), (3, 6635627), (17, 1170993), (51, 390331), (73, 272697), (219, 90899), (1241, 16041), (3723, 5347)]