21490641

素因数分解:

$3^2\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 31799040

約数和(自身を除く): 10308399

約数列:

[1, 3, 9, 97, 103, 239, 291, 309, 717, 873, 927, 2151, 9991, 23183, 24617, 29973, 69549, 73851, 89919, 208647, 221553, 2387849, 7163547, 21490641]

約数ペア:

[(1, 21490641), (3, 7163547), (9, 2387849), (97, 221553), (103, 208647), (239, 89919), (291, 73851), (309, 69549), (717, 29973), (873, 24617), (927, 23183), (2151, 9991)]