640760

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{193}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 1466640

約数和(自身を除く): 825880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 193, 332, 386, 415, 664, 772, 830, 965, 1544, 1660, 1930, 3320, 3860, 7720, 16019, 32038, 64076, 80095, 128152, 160190, 320380, 640760]

約数ペア:

[(1, 640760), (2, 320380), (4, 160190), (5, 128152), (8, 80095), (10, 64076), (20, 32038), (40, 16019), (83, 7720), (166, 3860), (193, 3320), (332, 1930), (386, 1660), (415, 1544), (664, 965), (772, 830)]