20128840

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4703}}^1$

素因数の和:4821

約数の個数: 32

約数和(自身を含む): 45722880

約数和(自身を除く): 25594040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4703, 9406, 18812, 23515, 37624, 47030, 94060, 188120, 503221, 1006442, 2012884, 2516105, 4025768, 5032210, 10064420, 20128840]

約数ペア:

[(1, 20128840), (2, 10064420), (4, 5032210), (5, 4025768), (8, 2516105), (10, 2012884), (20, 1006442), (40, 503221), (107, 188120), (214, 94060), (428, 47030), (535, 37624), (856, 23515), (1070, 18812), (2140, 9406), (4280, 4703)]