850840

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 1944000

約数和(自身を除く): 1093160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 239, 356, 445, 478, 712, 890, 956, 1195, 1780, 1912, 2390, 3560, 4780, 9560, 21271, 42542, 85084, 106355, 170168, 212710, 425420, 850840]

約数ペア:

[(1, 850840), (2, 425420), (4, 212710), (5, 170168), (8, 106355), (10, 85084), (20, 42542), (40, 21271), (89, 9560), (178, 4780), (239, 3560), (356, 2390), (445, 1912), (478, 1780), (712, 1195), (890, 956)]