21286581

素因数分解:

$3^1\times {\mathrm{37}}^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:221

約数の個数: 24

約数和(自身を含む): 29985984

約数和(自身を除く): 8699403

約数列:

[1, 3, 37, 71, 73, 111, 213, 219, 1369, 2627, 2701, 4107, 5183, 7881, 8103, 15549, 97199, 99937, 191771, 291597, 299811, 575313, 7095527, 21286581]

約数ペア:

[(1, 21286581), (3, 7095527), (37, 575313), (71, 299811), (73, 291597), (111, 191771), (213, 99937), (219, 97199), (1369, 15549), (2627, 8103), (2701, 7881), (4107, 5183)]