20984840

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4903}}^1$

素因数の和:5021

約数の個数: 32

約数和(自身を含む): 47666880

約数和(自身を除く): 26682040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4903, 9806, 19612, 24515, 39224, 49030, 98060, 196120, 524621, 1049242, 2098484, 2623105, 4196968, 5246210, 10492420, 20984840]

約数ペア:

[(1, 20984840), (2, 10492420), (4, 5246210), (5, 4196968), (8, 2623105), (10, 2098484), (20, 1049242), (40, 524621), (107, 196120), (214, 98060), (428, 49030), (535, 39224), (856, 24515), (1070, 19612), (2140, 9806), (4280, 4903)]