20909139

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:475

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10540461

約数列:

[1, 3, 19, 23, 41, 57, 69, 123, 389, 437, 779, 943, 1167, 1311, 2337, 2829, 7391, 8947, 15949, 17917, 22173, 26841, 47847, 53751, 169993, 303031, 366827, 509979, 909093, 1100481, 6969713, 20909139]

約数ペア:

[(1, 20909139), (3, 6969713), (19, 1100481), (23, 909093), (41, 509979), (57, 366827), (69, 303031), (123, 169993), (389, 53751), (437, 47847), (779, 26841), (943, 22173), (1167, 17917), (1311, 15949), (2337, 8947), (2829, 7391)]