20387969

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{359}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 25444800

約数和(自身を除く): 5056831

約数列:

[1, 7, 19, 49, 61, 133, 359, 427, 931, 1159, 2513, 2989, 6821, 8113, 17591, 21899, 47747, 56791, 153293, 334229, 416081, 1073051, 2912567, 20387969]

約数ペア:

[(1, 20387969), (7, 2912567), (19, 1073051), (49, 416081), (61, 334229), (133, 153293), (359, 56791), (427, 47747), (931, 21899), (1159, 17591), (2513, 8113), (2989, 6821)]