7886777380

素因数分解:

$2^2\times 5^1\times {\mathrm{394338869}}^1$

素因数の和:394338878

約数の個数: 12

約数和(自身を含む): 16562232540

約数和(自身を除く): 8675455160

約数列:

[1, 2, 4, 5, 10, 20, 394338869, 788677738, 1577355476, 1971694345, 3943388690, 7886777380]

約数ペア:

[(1, 7886777380), (2, 3943388690), (4, 1971694345), (5, 1577355476), (10, 788677738), (20, 394338869)]