20989168

素因数分解:

$2^4\times {\mathrm{197}}^1\times {\mathrm{6659}}^1$

素因数の和:6864

約数の個数: 20

約数和(自身を含む): 40879080

約数和(自身を除く): 19889912

約数列:

[1, 2, 4, 8, 16, 197, 394, 788, 1576, 3152, 6659, 13318, 26636, 53272, 106544, 1311823, 2623646, 5247292, 10494584, 20989168]

約数ペア:

[(1, 20989168), (2, 10494584), (4, 5247292), (8, 2623646), (16, 1311823), (197, 106544), (394, 53272), (788, 26636), (1576, 13318), (3152, 6659)]