19979013

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 29352960

約数和(自身を除く): 9373947

約数列:

[1, 3, 19, 41, 57, 83, 103, 123, 249, 309, 779, 1577, 1957, 2337, 3403, 4223, 4731, 5871, 8549, 10209, 12669, 25647, 64657, 80237, 162431, 193971, 240711, 350509, 487293, 1051527, 6659671, 19979013]

約数ペア:

[(1, 19979013), (3, 6659671), (19, 1051527), (41, 487293), (57, 350509), (83, 240711), (103, 193971), (123, 162431), (249, 80237), (309, 64657), (779, 25647), (1577, 12669), (1957, 10209), (2337, 8549), (3403, 5871), (4223, 4731)]