640233

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1$

素因数の和:269

約数の個数: 24

約数和(自身を含む): 1048320

約数和(自身を除く): 408087

約数列:

[1, 3, 9, 11, 29, 33, 87, 99, 223, 261, 319, 669, 957, 2007, 2453, 2871, 6467, 7359, 19401, 22077, 58203, 71137, 213411, 640233]

約数ペア:

[(1, 640233), (3, 213411), (9, 71137), (11, 58203), (29, 22077), (33, 19401), (87, 7359), (99, 6467), (223, 2871), (261, 2453), (319, 2007), (669, 957)]