21406670

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5503}}^1$

素因数の和:5899

約数の個数: 16

約数和(自身を含む): 38638080

約数和(自身を除く): 17231410

約数列:

[1, 2, 5, 10, 389, 778, 1945, 3890, 5503, 11006, 27515, 55030, 2140667, 4281334, 10703335, 21406670]

約数ペア:

[(1, 21406670), (2, 10703335), (5, 4281334), (10, 2140667), (389, 55030), (778, 27515), (1945, 11006), (3890, 5503)]