19728779

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1\times {\mathrm{433}}^1$

素因数の和:746

約数の個数: 16

約数和(自身を含む): 23665152

約数和(自身を除く): 3936373

約数列:

[1, 7, 23, 161, 283, 433, 1981, 3031, 6509, 9959, 45563, 69713, 122539, 857773, 2818397, 19728779]

約数ペア:

[(1, 19728779), (7, 2818397), (23, 857773), (161, 122539), (283, 69713), (433, 45563), (1981, 9959), (3031, 6509)]