18916280

素因数分解:

$2^3\times 5^1\times {\mathrm{472907}}^1$

素因数の和:472918

約数の個数: 16

約数和(自身を含む): 42561720

約数和(自身を除く): 23645440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 472907, 945814, 1891628, 2364535, 3783256, 4729070, 9458140, 18916280]

約数ペア:

[(1, 18916280), (2, 9458140), (4, 4729070), (5, 3783256), (8, 2364535), (10, 1891628), (20, 945814), (40, 472907)]