19779879

素因数分解:

$3^1\times 7^2\times {\mathrm{239}}^1\times {\mathrm{563}}^1$

素因数の和:819

約数の個数: 24

約数和(自身を含む): 30862080

約数和(自身を除く): 11082201

約数列:

[1, 3, 7, 21, 49, 147, 239, 563, 717, 1673, 1689, 3941, 5019, 11711, 11823, 27587, 35133, 82761, 134557, 403671, 941899, 2825697, 6593293, 19779879]

約数ペア:

[(1, 19779879), (3, 6593293), (7, 2825697), (21, 941899), (49, 403671), (147, 134557), (239, 82761), (563, 35133), (717, 27587), (1673, 11823), (1689, 11711), (3941, 5019)]