20012187

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{239}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 30643200

約数和(自身を除く): 10631013

約数列:

[1, 3, 13, 19, 39, 57, 113, 239, 247, 339, 717, 741, 1469, 2147, 3107, 4407, 4541, 6441, 9321, 13623, 27007, 27911, 59033, 81021, 83733, 177099, 351091, 513133, 1053273, 1539399, 6670729, 20012187]

約数ペア:

[(1, 20012187), (3, 6670729), (13, 1539399), (19, 1053273), (39, 513133), (57, 351091), (113, 177099), (239, 83733), (247, 81021), (339, 59033), (717, 27911), (741, 27007), (1469, 13623), (2147, 9321), (3107, 6441), (4407, 4541)]