18972909

素因数分解:

$3^2\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{211}}^1$

素因数の和:417

約数の個数: 24

約数和(自身を含む): 28089152

約数和(自身を除く): 9116243

約数列:

[1, 3, 9, 97, 103, 211, 291, 309, 633, 873, 927, 1899, 9991, 20467, 21733, 29973, 61401, 65199, 89919, 184203, 195597, 2108101, 6324303, 18972909]

約数ペア:

[(1, 18972909), (3, 6324303), (9, 2108101), (97, 195597), (103, 184203), (211, 89919), (291, 65199), (309, 61401), (633, 29973), (873, 21733), (927, 20467), (1899, 9991)]