28509481

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1499}}^1$

素因数の和:1549

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 11810519

約数列:

[1, 7, 11, 13, 19, 77, 91, 133, 143, 209, 247, 1001, 1463, 1499, 1729, 2717, 10493, 16489, 19019, 19487, 28481, 115423, 136409, 199367, 214357, 313291, 370253, 1500499, 2193037, 2591771, 4072783, 28509481]

約数ペア:

[(1, 28509481), (7, 4072783), (11, 2591771), (13, 2193037), (19, 1500499), (77, 370253), (91, 313291), (133, 214357), (143, 199367), (209, 136409), (247, 115423), (1001, 28481), (1463, 19487), (1499, 19019), (1729, 16489), (2717, 10493)]