81156440

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{12923}}^1$

素因数の和:13091

約数の個数: 32

約数和(自身を含む): 183779280

約数和(自身を除く): 102622840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 12923, 25846, 51692, 64615, 103384, 129230, 258460, 516920, 2028911, 4057822, 8115644, 10144555, 16231288, 20289110, 40578220, 81156440]

約数ペア:

[(1, 81156440), (2, 40578220), (4, 20289110), (5, 16231288), (8, 10144555), (10, 8115644), (20, 4057822), (40, 2028911), (157, 516920), (314, 258460), (628, 129230), (785, 103384), (1256, 64615), (1570, 51692), (3140, 25846), (6280, 12923)]