19577780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12391}}^1$

素因数の和:12479

約数の個数: 24

約数和(自身を含む): 41637120

約数和(自身を除く): 22059340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12391, 24782, 49564, 61955, 123910, 247820, 978889, 1957778, 3915556, 4894445, 9788890, 19577780]

約数ペア:

[(1, 19577780), (2, 9788890), (4, 4894445), (5, 3915556), (10, 1957778), (20, 978889), (79, 247820), (158, 123910), (316, 61955), (395, 49564), (790, 24782), (1580, 12391)]