20178487749

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{50572651}}^1$

素因数の和:50572680

約数の個数: 16

約数和(自身を含む): 32366497280

約数和(自身を除く): 12188009531

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 50572651, 151717953, 354008557, 960880369, 1062025671, 2882641107, 6726162583, 20178487749]

約数ペア:

[(1, 20178487749), (3, 6726162583), (7, 2882641107), (19, 1062025671), (21, 960880369), (57, 354008557), (133, 151717953), (399, 50572651)]