19720195

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{167}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 7858685

約数列:

[1, 5, 11, 19, 55, 95, 113, 167, 209, 565, 835, 1045, 1243, 1837, 2147, 3173, 6215, 9185, 10735, 15865, 18871, 23617, 34903, 94355, 118085, 174515, 207581, 358549, 1037905, 1792745, 3944039, 19720195]

約数ペア:

[(1, 19720195), (5, 3944039), (11, 1792745), (19, 1037905), (55, 358549), (95, 207581), (113, 174515), (167, 118085), (209, 94355), (565, 34903), (835, 23617), (1045, 18871), (1243, 15865), (1837, 10735), (2147, 9185), (3173, 6215)]