21181204

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{641}}^1\times {\mathrm{751}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 40553856

約数和(自身を除く): 19372652

約数列:

[1, 2, 4, 11, 22, 44, 641, 751, 1282, 1502, 2564, 3004, 7051, 8261, 14102, 16522, 28204, 33044, 481391, 962782, 1925564, 5295301, 10590602, 21181204]

約数ペア:

[(1, 21181204), (2, 10590602), (4, 5295301), (11, 1925564), (22, 962782), (44, 481391), (641, 33044), (751, 28204), (1282, 16522), (1502, 14102), (2564, 8261), (3004, 7051)]