19989879

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1979}}^1$

素因数の和:2039

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 13717641

約数列:

[1, 3, 7, 13, 21, 37, 39, 91, 111, 259, 273, 481, 777, 1443, 1979, 3367, 5937, 10101, 13853, 25727, 41559, 73223, 77181, 180089, 219669, 512561, 540267, 951899, 1537683, 2855697, 6663293, 19989879]

約数ペア:

[(1, 19989879), (3, 6663293), (7, 2855697), (13, 1537683), (21, 951899), (37, 540267), (39, 512561), (91, 219669), (111, 180089), (259, 77181), (273, 73223), (481, 41559), (777, 25727), (1443, 13853), (1979, 10101), (3367, 5937)]