425420

素因数分解:

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

素因数の和:337

約数の個数: 24

約数和(自身を含む): 907200

約数和(自身を除く): 481780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 239, 356, 445, 478, 890, 956, 1195, 1780, 2390, 4780, 21271, 42542, 85084, 106355, 212710, 425420]

約数ペア:

[(1, 425420), (2, 212710), (4, 106355), (5, 85084), (10, 42542), (20, 21271), (89, 4780), (178, 2390), (239, 1780), (356, 1195), (445, 956), (478, 890)]