267280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1$

素因数の和:283

約数の個数: 40

約数和(自身を含む): 671832

約数和(自身を除く): 404552

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 257, 260, 514, 520, 1028, 1040, 1285, 2056, 2570, 3341, 4112, 5140, 6682, 10280, 13364, 16705, 20560, 26728, 33410, 53456, 66820, 133640, 267280]

約数ペア:

[(1, 267280), (2, 133640), (4, 66820), (5, 53456), (8, 33410), (10, 26728), (13, 20560), (16, 16705), (20, 13364), (26, 10280), (40, 6682), (52, 5140), (65, 4112), (80, 3341), (104, 2570), (130, 2056), (208, 1285), (257, 1040), (260, 1028), (514, 520)]