20961700

素因数分解:

$2^2\times 5^2\times {\mathrm{97}}^1\times {\mathrm{2161}}^1$

素因数の和:2272

約数の個数: 36

約数和(自身を含む): 45977092

約数和(自身を除く): 25015392

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 97, 100, 194, 388, 485, 970, 1940, 2161, 2425, 4322, 4850, 8644, 9700, 10805, 21610, 43220, 54025, 108050, 209617, 216100, 419234, 838468, 1048085, 2096170, 4192340, 5240425, 10480850, 20961700]

約数ペア:

[(1, 20961700), (2, 10480850), (4, 5240425), (5, 4192340), (10, 2096170), (20, 1048085), (25, 838468), (50, 419234), (97, 216100), (100, 209617), (194, 108050), (388, 54025), (485, 43220), (970, 21610), (1940, 10805), (2161, 9700), (2425, 8644), (4322, 4850)]