21004280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47737}}^1$

素因数の和:47759

約数の個数: 32

約数和(自身を含む): 51557040

約数和(自身を除く): 30552760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 47737, 95474, 190948, 238685, 381896, 477370, 525107, 954740, 1050214, 1909480, 2100428, 2625535, 4200856, 5251070, 10502140, 21004280]

約数ペア:

[(1, 21004280), (2, 10502140), (4, 5251070), (5, 4200856), (8, 2625535), (10, 2100428), (11, 1909480), (20, 1050214), (22, 954740), (40, 525107), (44, 477370), (55, 381896), (88, 238685), (110, 190948), (220, 95474), (440, 47737)]