21086469

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:198

約数の個数: 36

約数和(自身を含む): 32896864

約数和(自身を除く): 11810395

約数列:

[1, 3, 9, 23, 43, 69, 103, 129, 207, 309, 387, 529, 927, 989, 1587, 2369, 2967, 4429, 4761, 7107, 8901, 13287, 21321, 22747, 39861, 54487, 68241, 101867, 163461, 204723, 305601, 490383, 916803, 2342941, 7028823, 21086469]

約数ペア:

[(1, 21086469), (3, 7028823), (9, 2342941), (23, 916803), (43, 490383), (69, 305601), (103, 204723), (129, 163461), (207, 101867), (309, 68241), (387, 54487), (529, 39861), (927, 22747), (989, 21321), (1587, 13287), (2369, 8901), (2967, 7107), (4429, 4761)]