643968208

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{99871}}^1$

素因数の和:99923

約数の個数: 40

約数和(自身を含む): 1387022336

約数和(自身を除く): 743054128

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 6448, 99871, 199742, 399484, 798968, 1298323, 1597936, 2596646, 3096001, 5193292, 6192002, 10386584, 12384004, 20773168, 24768008, 40248013, 49536016, 80496026, 160992052, 321984104, 643968208]

約数ペア:

[(1, 643968208), (2, 321984104), (4, 160992052), (8, 80496026), (13, 49536016), (16, 40248013), (26, 24768008), (31, 20773168), (52, 12384004), (62, 10386584), (104, 6192002), (124, 5193292), (208, 3096001), (248, 2596646), (403, 1597936), (496, 1298323), (806, 798968), (1612, 399484), (3224, 199742), (6448, 99871)]