20288120

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1033}}^1$

素因数の和:1535

約数の個数: 32

約数和(自身を含む): 45785520

約数和(自身を除く): 25497400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1033, 1964, 2066, 2455, 3928, 4132, 4910, 5165, 8264, 9820, 10330, 19640, 20660, 41320, 507203, 1014406, 2028812, 2536015, 4057624, 5072030, 10144060, 20288120]

約数ペア:

[(1, 20288120), (2, 10144060), (4, 5072030), (5, 4057624), (8, 2536015), (10, 2028812), (20, 1014406), (40, 507203), (491, 41320), (982, 20660), (1033, 19640), (1964, 10330), (2066, 9820), (2455, 8264), (3928, 5165), (4132, 4910)]