21028568

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{1213}}^1$

素因数の和:1427

約数の個数: 32

約数和(自身を含む): 43266960

約数和(自身を除く): 22238392

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 197, 394, 788, 1213, 1576, 2167, 2426, 4334, 4852, 8668, 9704, 13343, 17336, 26686, 53372, 106744, 238961, 477922, 955844, 1911688, 2628571, 5257142, 10514284, 21028568]

約数ペア:

[(1, 21028568), (2, 10514284), (4, 5257142), (8, 2628571), (11, 1911688), (22, 955844), (44, 477922), (88, 238961), (197, 106744), (394, 53372), (788, 26686), (1213, 17336), (1576, 13343), (2167, 9704), (2426, 8668), (4334, 4852)]