20861721

素因数分解:

$3^2\times {\mathrm{73}}^1\times {\mathrm{113}}^1\times {\mathrm{281}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 30926376

約数和(自身を除く): 10064655

約数列:

[1, 3, 9, 73, 113, 219, 281, 339, 657, 843, 1017, 2529, 8249, 20513, 24747, 31753, 61539, 74241, 95259, 184617, 285777, 2317969, 6953907, 20861721]

約数ペア:

[(1, 20861721), (3, 6953907), (9, 2317969), (73, 285777), (113, 184617), (219, 95259), (281, 74241), (339, 61539), (657, 31753), (843, 24747), (1017, 20513), (2529, 8249)]