18181988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4643}}^1$

素因数の和:4747

約数の個数: 24

約数和(自身を含む): 35108640

約数和(自身を除く): 16926652

約数列:

[1, 2, 4, 11, 22, 44, 89, 178, 356, 979, 1958, 3916, 4643, 9286, 18572, 51073, 102146, 204292, 413227, 826454, 1652908, 4545497, 9090994, 18181988]

約数ペア:

[(1, 18181988), (2, 9090994), (4, 4545497), (11, 1652908), (22, 826454), (44, 413227), (89, 204292), (178, 102146), (356, 51073), (979, 18572), (1958, 9286), (3916, 4643)]