19747915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{233}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 27495936

約数和(自身を除く): 7748021

約数列:

[1, 5, 11, 23, 55, 67, 115, 233, 253, 335, 737, 1165, 1265, 1541, 2563, 3685, 5359, 7705, 12815, 15611, 16951, 26795, 58949, 78055, 84755, 171721, 294745, 359053, 858605, 1795265, 3949583, 19747915]

約数ペア:

[(1, 19747915), (5, 3949583), (11, 1795265), (23, 858605), (55, 359053), (67, 294745), (115, 171721), (233, 84755), (253, 78055), (335, 58949), (737, 26795), (1165, 16951), (1265, 15611), (1541, 12815), (2563, 7705), (3685, 5359)]