21393988

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{9923}}^1$

素因数の和:9952

約数の個数: 36

約数和(自身を含む): 47516112

約数和(自身を除く): 26122124

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 308, 539, 1078, 2156, 9923, 19846, 39692, 69461, 109153, 138922, 218306, 277844, 436612, 486227, 764071, 972454, 1528142, 1944908, 3056284, 5348497, 10696994, 21393988]

約数ペア:

[(1, 21393988), (2, 10696994), (4, 5348497), (7, 3056284), (11, 1944908), (14, 1528142), (22, 972454), (28, 764071), (44, 486227), (49, 436612), (77, 277844), (98, 218306), (154, 138922), (196, 109153), (308, 69461), (539, 39692), (1078, 19846), (2156, 9923)]