199919995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{10069}}^1$

素因数の和:10123

約数の個数: 24

約数和(自身を含む): 276240240

約数和(自身を除く): 76320245

約数列:

[1, 5, 11, 19, 55, 95, 209, 361, 1045, 1805, 3971, 10069, 19855, 50345, 110759, 191311, 553795, 956555, 2104421, 3634909, 10522105, 18174545, 39983999, 199919995]

約数ペア:

[(1, 199919995), (5, 39983999), (11, 18174545), (19, 10522105), (55, 3634909), (95, 2104421), (209, 956555), (361, 553795), (1045, 191311), (1805, 110759), (3971, 50345), (10069, 19855)]