1981225

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:169

約数の個数: 24

約数和(自身を含む): 2673440

約数和(自身を除く): 692215

約数列:

[1, 5, 19, 25, 43, 95, 97, 215, 475, 485, 817, 1075, 1843, 2425, 4085, 4171, 9215, 20425, 20855, 46075, 79249, 104275, 396245, 1981225]

約数ペア:

[(1, 1981225), (5, 396245), (19, 104275), (25, 79249), (43, 46075), (95, 20855), (97, 20425), (215, 9215), (475, 4171), (485, 4085), (817, 2425), (1075, 1843)]