12657880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{4457}}^1$

素因数の和:4539

約数の個数: 32

約数和(自身を含む): 28887840

約数和(自身を除く): 16229960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 4457, 8914, 17828, 22285, 35656, 44570, 89140, 178280, 316447, 632894, 1265788, 1582235, 2531576, 3164470, 6328940, 12657880]

約数ペア:

[(1, 12657880), (2, 6328940), (4, 3164470), (5, 2531576), (8, 1582235), (10, 1265788), (20, 632894), (40, 316447), (71, 178280), (142, 89140), (284, 44570), (355, 35656), (568, 22285), (710, 17828), (1420, 8914), (2840, 4457)]