20475320

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{919}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 46202400

約数和(自身を除く): 25727080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 919, 1114, 1838, 2228, 2785, 3676, 4456, 4595, 5570, 7352, 9190, 11140, 18380, 22280, 36760, 511883, 1023766, 2047532, 2559415, 4095064, 5118830, 10237660, 20475320]

約数ペア:

[(1, 20475320), (2, 10237660), (4, 5118830), (5, 4095064), (8, 2559415), (10, 2047532), (20, 1023766), (40, 511883), (557, 36760), (919, 22280), (1114, 18380), (1838, 11140), (2228, 9190), (2785, 7352), (3676, 5570), (4456, 4595)]