19870955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{347}}^1\times {\mathrm{881}}^1$

素因数の和:1246

約数の個数: 16

約数和(自身を含む): 25782624

約数和(自身を除く): 5911669

約数列:

[1, 5, 13, 65, 347, 881, 1735, 4405, 4511, 11453, 22555, 57265, 305707, 1528535, 3974191, 19870955]

約数ペア:

[(1, 19870955), (5, 3974191), (13, 1528535), (65, 305707), (347, 57265), (881, 22555), (1735, 11453), (4405, 4511)]