20255408

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{499}}^1$

素因数の和:609

約数の個数: 40

約数和(自身を含む): 40920000

約数和(自身を除く): 20664592

約数列:

[1, 2, 4, 8, 16, 43, 59, 86, 118, 172, 236, 344, 472, 499, 688, 944, 998, 1996, 2537, 3992, 5074, 7984, 10148, 20296, 21457, 29441, 40592, 42914, 58882, 85828, 117764, 171656, 235528, 343312, 471056, 1265963, 2531926, 5063852, 10127704, 20255408]

約数ペア:

[(1, 20255408), (2, 10127704), (4, 5063852), (8, 2531926), (16, 1265963), (43, 471056), (59, 343312), (86, 235528), (118, 171656), (172, 117764), (236, 85828), (344, 58882), (472, 42914), (499, 40592), (688, 29441), (944, 21457), (998, 20296), (1996, 10148), (2537, 7984), (3992, 5074)]