18340720

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3229}}^1$

素因数の和:3313

約数の個数: 40

約数和(自身を含む): 43256160

約数和(自身を除く): 24915440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3229, 5680, 6458, 12916, 16145, 25832, 32290, 51664, 64580, 129160, 229259, 258320, 458518, 917036, 1146295, 1834072, 2292590, 3668144, 4585180, 9170360, 18340720]

約数ペア:

[(1, 18340720), (2, 9170360), (4, 4585180), (5, 3668144), (8, 2292590), (10, 1834072), (16, 1146295), (20, 917036), (40, 458518), (71, 258320), (80, 229259), (142, 129160), (284, 64580), (355, 51664), (568, 32290), (710, 25832), (1136, 16145), (1420, 12916), (2840, 6458), (3229, 5680)]