19781645

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{1123}}^1$

素因数の和:1412

約数の個数: 16

約数和(自身を含む): 25681152

約数和(自身を除く): 5899507

約数列:

[1, 5, 13, 65, 271, 1123, 1355, 3523, 5615, 14599, 17615, 72995, 304333, 1521665, 3956329, 19781645]

約数ペア:

[(1, 19781645), (5, 3956329), (13, 1521665), (65, 304333), (271, 72995), (1123, 17615), (1355, 14599), (3523, 5615)]