21109916

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{1327}}^1$

素因数の和:1469

約数の個数: 24

約数和(自身を含む): 38262336

約数和(自身を除く): 17152420

約数列:

[1, 2, 4, 41, 82, 97, 164, 194, 388, 1327, 2654, 3977, 5308, 7954, 15908, 54407, 108814, 128719, 217628, 257438, 514876, 5277479, 10554958, 21109916]

約数ペア:

[(1, 21109916), (2, 10554958), (4, 5277479), (41, 514876), (82, 257438), (97, 217628), (164, 128719), (194, 108814), (388, 54407), (1327, 15908), (2654, 7954), (3977, 5308)]