639771836

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{65203}}^1$

素因数の和:65441

約数の個数: 24

約数和(自身を含む): 1226878464

約数和(自身を除く): 587106628

約数列:

[1, 2, 4, 11, 22, 44, 223, 446, 892, 2453, 4906, 9812, 65203, 130406, 260812, 717233, 1434466, 2868932, 14540269, 29080538, 58161076, 159942959, 319885918, 639771836]

約数ペア:

[(1, 639771836), (2, 319885918), (4, 159942959), (11, 58161076), (22, 29080538), (44, 14540269), (223, 2868932), (446, 1434466), (892, 717233), (2453, 260812), (4906, 130406), (9812, 65203)]