20168589

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 32000256

約数和(自身を除く): 11831667

約数列:

[1, 3, 7, 21, 37, 101, 111, 257, 259, 303, 707, 771, 777, 1799, 2121, 3737, 5397, 9509, 11211, 25957, 26159, 28527, 66563, 77871, 78477, 181699, 199689, 545097, 960409, 2881227, 6722863, 20168589]

約数ペア:

[(1, 20168589), (3, 6722863), (7, 2881227), (21, 960409), (37, 545097), (101, 199689), (111, 181699), (257, 78477), (259, 77871), (303, 66563), (707, 28527), (771, 26159), (777, 25957), (1799, 11211), (2121, 9509), (3737, 5397)]