2020508920

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{78803}}^1$

素因数の和:79455

約数の個数: 32

約数和(自身を含む): 4553295120

約数和(自身を除く): 2532786200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820, 25640, 78803, 157606, 315212, 394015, 630424, 788030, 1576060, 3152120, 50512723, 101025446, 202050892, 252563615, 404101784, 505127230, 1010254460, 2020508920]

約数ペア:

[(1, 2020508920), (2, 1010254460), (4, 505127230), (5, 404101784), (8, 252563615), (10, 202050892), (20, 101025446), (40, 50512723), (641, 3152120), (1282, 1576060), (2564, 788030), (3205, 630424), (5128, 394015), (6410, 315212), (12820, 157606), (25640, 78803)]