21457480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48767}}^1$

素因数の和:48789

約数の個数: 32

約数和(自身を含む): 52669440

約数和(自身を除く): 31211960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48767, 97534, 195068, 243835, 390136, 487670, 536437, 975340, 1072874, 1950680, 2145748, 2682185, 4291496, 5364370, 10728740, 21457480]

約数ペア:

[(1, 21457480), (2, 10728740), (4, 5364370), (5, 4291496), (8, 2682185), (10, 2145748), (11, 1950680), (20, 1072874), (22, 975340), (40, 536437), (44, 487670), (55, 390136), (88, 243835), (110, 195068), (220, 97534), (440, 48767)]