638409025

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{16193}}^1$

素因数の和:16305

約数の個数: 24

約数和(自身を含む): 843383520

約数和(自身を除く): 204974495

約数列:

[1, 5, 19, 25, 83, 95, 415, 475, 1577, 2075, 7885, 16193, 39425, 80965, 307667, 404825, 1344019, 1538335, 6720095, 7691675, 25536361, 33600475, 127681805, 638409025]

約数ペア:

[(1, 638409025), (5, 127681805), (19, 33600475), (25, 25536361), (83, 7691675), (95, 6720095), (415, 1538335), (475, 1344019), (1577, 404825), (2075, 307667), (7885, 80965), (16193, 39425)]