19816540

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6311}}^1$

素因数の和:6477

約数の個数: 24

約数和(自身を含む): 41886432

約数和(自身を除く): 22069892

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6311, 12622, 25244, 31555, 63110, 126220, 990827, 1981654, 3963308, 4954135, 9908270, 19816540]

約数ペア:

[(1, 19816540), (2, 9908270), (4, 4954135), (5, 3963308), (10, 1981654), (20, 990827), (157, 126220), (314, 63110), (628, 31555), (785, 25244), (1570, 12622), (3140, 6311)]