21129812

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{12979}}^1$

素因数の和:13031

約数の個数: 24

約数和(自身を含む): 41432160

約数和(自身を除く): 20302348

約数列:

[1, 2, 4, 11, 22, 37, 44, 74, 148, 407, 814, 1628, 12979, 25958, 51916, 142769, 285538, 480223, 571076, 960446, 1920892, 5282453, 10564906, 21129812]

約数ペア:

[(1, 21129812), (2, 10564906), (4, 5282453), (11, 1920892), (22, 960446), (37, 571076), (44, 480223), (74, 285538), (148, 142769), (407, 51916), (814, 25958), (1628, 12979)]