19990719

素因数分解:

$3^4\times 7^1\times {\mathrm{35257}}^1$

素因数の和:35276

約数の個数: 20

約数和(自身を含む): 34129744

約数和(自身を除く): 14139025

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 35257, 105771, 246799, 317313, 740397, 951939, 2221191, 2855817, 6663573, 19990719]

約数ペア:

[(1, 19990719), (3, 6663573), (7, 2855817), (9, 2221191), (21, 951939), (27, 740397), (63, 317313), (81, 246799), (189, 105771), (567, 35257)]