21254128

素因数分解:

$2^4\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1741}}^1$

素因数の和:1865

約数の個数: 40

約数和(自身を含む): 47521760

約数和(自身を除く): 26267632

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 109, 112, 218, 436, 763, 872, 1526, 1741, 1744, 3052, 3482, 6104, 6964, 12187, 12208, 13928, 24374, 27856, 48748, 97496, 189769, 194992, 379538, 759076, 1328383, 1518152, 2656766, 3036304, 5313532, 10627064, 21254128]

約数ペア:

[(1, 21254128), (2, 10627064), (4, 5313532), (7, 3036304), (8, 2656766), (14, 1518152), (16, 1328383), (28, 759076), (56, 379538), (109, 194992), (112, 189769), (218, 97496), (436, 48748), (763, 27856), (872, 24374), (1526, 13928), (1741, 12208), (1744, 12187), (3052, 6964), (3482, 6104)]