20165900

素因数分解:

$2^2\times 5^2\times {\mathrm{421}}^1\times {\mathrm{479}}^1$

素因数の和:914

約数の個数: 36

約数和(自身を含む): 43955520

約数和(自身を除く): 23789620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 421, 479, 842, 958, 1684, 1916, 2105, 2395, 4210, 4790, 8420, 9580, 10525, 11975, 21050, 23950, 42100, 47900, 201659, 403318, 806636, 1008295, 2016590, 4033180, 5041475, 10082950, 20165900]

約数ペア:

[(1, 20165900), (2, 10082950), (4, 5041475), (5, 4033180), (10, 2016590), (20, 1008295), (25, 806636), (50, 403318), (100, 201659), (421, 47900), (479, 42100), (842, 23950), (958, 21050), (1684, 11975), (1916, 10525), (2105, 9580), (2395, 8420), (4210, 4790)]