20905339

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{113}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6673541

約数列:

[1, 7, 13, 19, 91, 107, 113, 133, 247, 749, 791, 1391, 1469, 1729, 2033, 2147, 9737, 10283, 12091, 14231, 15029, 26429, 27911, 84637, 157183, 185003, 195377, 229729, 1100281, 1608103, 2986477, 20905339]

約数ペア:

[(1, 20905339), (7, 2986477), (13, 1608103), (19, 1100281), (91, 229729), (107, 195377), (113, 185003), (133, 157183), (247, 84637), (749, 27911), (791, 26429), (1391, 15029), (1469, 14231), (1729, 12091), (2033, 10283), (2147, 9737)]