19663120

素因数分解:

$2^4\times 5^1\times {\mathrm{245789}}^1$

素因数の和:245802

約数の個数: 20

約数和(自身を含む): 45716940

約数和(自身を除く): 26053820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245789, 491578, 983156, 1228945, 1966312, 2457890, 3932624, 4915780, 9831560, 19663120]

約数ペア:

[(1, 19663120), (2, 9831560), (4, 4915780), (5, 3932624), (8, 2457890), (10, 1966312), (16, 1228945), (20, 983156), (40, 491578), (80, 245789)]