20178866980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9256361}}^1$

素因数の和:9256479

約数の個数: 24

約数和(自身を含む): 42764392440

約数和(自身を除く): 22585525460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9256361, 18512722, 37025444, 46281805, 92563610, 185127220, 1008943349, 2017886698, 4035773396, 5044716745, 10089433490, 20178866980]

約数ペア:

[(1, 20178866980), (2, 10089433490), (4, 5044716745), (5, 4035773396), (10, 2017886698), (20, 1008943349), (109, 185127220), (218, 92563610), (436, 46281805), (545, 37025444), (1090, 18512722), (2180, 9256361)]