1289587940

素因数分解:

$2^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{100279}}^1$

素因数の和:100931

約数の個数: 24

約数和(自身を含む): 2712373440

約数和(自身を除く): 1422785500

約数列:

[1, 2, 4, 5, 10, 20, 643, 1286, 2572, 3215, 6430, 12860, 100279, 200558, 401116, 501395, 1002790, 2005580, 64479397, 128958794, 257917588, 322396985, 644793970, 1289587940]

約数ペア:

[(1, 1289587940), (2, 644793970), (4, 322396985), (5, 257917588), (10, 128958794), (20, 64479397), (643, 2005580), (1286, 1002790), (2572, 501395), (3215, 401116), (6430, 200558), (12860, 100279)]