31978040

素因数分解:

$2^3\times 5^1\times {\mathrm{479}}^1\times {\mathrm{1669}}^1$

素因数の和:2159

約数の個数: 32

約数和(自身を含む): 72144000

約数和(自身を除く): 40165960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 479, 958, 1669, 1916, 2395, 3338, 3832, 4790, 6676, 8345, 9580, 13352, 16690, 19160, 33380, 66760, 799451, 1598902, 3197804, 3997255, 6395608, 7994510, 15989020, 31978040]

約数ペア:

[(1, 31978040), (2, 15989020), (4, 7994510), (5, 6395608), (8, 3997255), (10, 3197804), (20, 1598902), (40, 799451), (479, 66760), (958, 33380), (1669, 19160), (1916, 16690), (2395, 13352), (3338, 9580), (3832, 8345), (4790, 6676)]