19937665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{15761}}^1$

素因数の和:15800

約数の個数: 16

約数和(自身を含む): 27236736

約数和(自身を除く): 7299071

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 15761, 78805, 173371, 362503, 866855, 1812515, 3987533, 19937665]

約数ペア:

[(1, 19937665), (5, 3987533), (11, 1812515), (23, 866855), (55, 362503), (115, 173371), (253, 78805), (1265, 15761)]