20155478

素因数分解:

$2^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{2239}}^1$

素因数の和:2891

約数の個数: 16

約数和(自身を含む): 34621440

約数和(自身を除く): 14465962

約数列:

[1, 2, 7, 14, 643, 1286, 2239, 4478, 4501, 9002, 15673, 31346, 1439677, 2879354, 10077739, 20155478]

約数ペア:

[(1, 20155478), (2, 10077739), (7, 2879354), (14, 1439677), (643, 31346), (1286, 15673), (2239, 9002), (4478, 4501)]