280248280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{538939}}^1$

素因数の和:538963

約数の個数: 32

約数和(自身を含む): 679064400

約数和(自身を除く): 398816120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 538939, 1077878, 2155756, 2694695, 4311512, 5389390, 7006207, 10778780, 14012414, 21557560, 28024828, 35031035, 56049656, 70062070, 140124140, 280248280]

約数ペア:

[(1, 280248280), (2, 140124140), (4, 70062070), (5, 56049656), (8, 35031035), (10, 28024828), (13, 21557560), (20, 14012414), (26, 10778780), (40, 7006207), (52, 5389390), (65, 4311512), (104, 2694695), (130, 2155756), (260, 1077878), (520, 538939)]