256430512

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{39769}}^1$

素因数の和:39821

約数の個数: 40

約数和(自身を含む): 552325760

約数和(自身を除く): 295895248

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 6448, 39769, 79538, 159076, 318152, 516997, 636304, 1033994, 1232839, 2067988, 2465678, 4135976, 4931356, 8271952, 9862712, 16026907, 19725424, 32053814, 64107628, 128215256, 256430512]

約数ペア:

[(1, 256430512), (2, 128215256), (4, 64107628), (8, 32053814), (13, 19725424), (16, 16026907), (26, 9862712), (31, 8271952), (52, 4931356), (62, 4135976), (104, 2465678), (124, 2067988), (208, 1232839), (248, 1033994), (403, 636304), (496, 516997), (806, 318152), (1612, 159076), (3224, 79538), (6448, 39769)]