19497139280

素因数分解:

$2^4\times 5^1\times {\mathrm{243714241}}^1$

素因数の和:243714254

約数の個数: 20

約数和(自身を含む): 45330849012

約数和(自身を除く): 25833709732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243714241, 487428482, 974856964, 1218571205, 1949713928, 2437142410, 3899427856, 4874284820, 9748569640, 19497139280]

約数ペア:

[(1, 19497139280), (2, 9748569640), (4, 4874284820), (5, 3899427856), (8, 2437142410), (10, 1949713928), (16, 1218571205), (20, 974856964), (40, 487428482), (80, 243714241)]