251569180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{1789}}^1$

素因数の和:1966

約数の個数: 48

約数和(自身を含む): 541296000

約数和(自身を除く): 289726820

約数列:

[1, 2, 4, 5, 10, 20, 79, 89, 158, 178, 316, 356, 395, 445, 790, 890, 1580, 1780, 1789, 3578, 7031, 7156, 8945, 14062, 17890, 28124, 35155, 35780, 70310, 140620, 141331, 159221, 282662, 318442, 565324, 636884, 706655, 796105, 1413310, 1592210, 2826620, 3184420, 12578459, 25156918, 50313836, 62892295, 125784590, 251569180]

約数ペア:

[(1, 251569180), (2, 125784590), (4, 62892295), (5, 50313836), (10, 25156918), (20, 12578459), (79, 3184420), (89, 2826620), (158, 1592210), (178, 1413310), (316, 796105), (356, 706655), (395, 636884), (445, 565324), (790, 318442), (890, 282662), (1580, 159221), (1780, 141331), (1789, 140620), (3578, 70310), (7031, 35780), (7156, 35155), (8945, 28124), (14062, 17890)]